diff --git a/e2e/data-connect/package.json b/e2e/data-connect/package.json
index d9d1f234ab1..324589e2c7e 100644
--- a/e2e/data-connect/package.json
+++ b/e2e/data-connect/package.json
@@ -13,7 +13,7 @@
     "@types/node": "18.19.83",
     "ts-node": "^10.9.2",
     "tslib": "^2.1.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "dependencies": {
     "firebase": "11.8.1"
diff --git a/e2e/data-connect/yarn.lock b/e2e/data-connect/yarn.lock
index d8d5a981fef..46d295b6c1a 100644
--- a/e2e/data-connect/yarn.lock
+++ b/e2e/data-connect/yarn.lock
@@ -737,10 +737,10 @@ tslib@^2.1.0:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.8.1.tgz#612efe4ed235d567e8aba5f2a5fab70280ade83f"
   integrity sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==
 
-typescript@5.5.4:
-  version "5.5.4"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-5.5.4.tgz#d9852d6c82bad2d2eda4fd74a5762a8f5909e9ba"
-  integrity sha512-Mtq29sKDAEYP7aljRgtPOpTvOfbwRWlS6dPRzwjdE+C0R4brX/GUyhHSecbHMFLNBLcJIPt9nl9yG5TZ1weH+Q==
+typescript@5.9.3:
+  version "5.9.3"
+  resolved "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz#5b4f59e15310ab17a216f5d6cf53ee476ede670f"
+  integrity sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==
 
 undici-types@~5.26.4:
   version "5.26.5"
diff --git a/e2e/smoke-tests/package.json b/e2e/smoke-tests/package.json
index c957f018b5a..abd5ed56796 100644
--- a/e2e/smoke-tests/package.json
+++ b/e2e/smoke-tests/package.json
@@ -29,7 +29,7 @@
     "jest": "29.7.0",
     "jest-environment-jsdom": "29.7.0",
     "ts-node": "10.9.2",
-    "typescript": "5.5.4",
+    "typescript": "5.9.3",
     "webpack": "5.98.0",
     "webpack-cli": "5.1.4",
     "webpack-dev-server": "5.2.0"
diff --git a/e2e/smoke-tests/yarn.lock b/e2e/smoke-tests/yarn.lock
index b9a6d8e4451..065176f82ef 100644
--- a/e2e/smoke-tests/yarn.lock
+++ b/e2e/smoke-tests/yarn.lock
@@ -5422,10 +5422,10 @@ type-is@~1.6.18:
     media-typer "0.3.0"
     mime-types "~2.1.24"
 
-typescript@5.5.4:
-  version "5.5.4"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-5.5.4.tgz"
-  integrity sha512-Mtq29sKDAEYP7aljRgtPOpTvOfbwRWlS6dPRzwjdE+C0R4brX/GUyhHSecbHMFLNBLcJIPt9nl9yG5TZ1weH+Q==
+typescript@5.9.3:
+  version "5.9.3"
+  resolved "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz#5b4f59e15310ab17a216f5d6cf53ee476ede670f"
+  integrity sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==
 
 undici-types@~6.19.8:
   version "6.19.8"
diff --git a/integration/compat-interop/package.json b/integration/compat-interop/package.json
index d578466418a..670e133dd40 100644
--- a/integration/compat-interop/package.json
+++ b/integration/compat-interop/package.json
@@ -24,7 +24,7 @@
     "@firebase/remote-config-compat": "0.2.20"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "engines": {
     "node": ">=20.0.0"
diff --git a/integration/compat-typings/package.json b/integration/compat-typings/package.json
index 6ad4d2e1298..9acf1387280 100644
--- a/integration/compat-typings/package.json
+++ b/integration/compat-typings/package.json
@@ -10,7 +10,7 @@
     "firebase": "*"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "engines": {
     "node": ">=20.0.0"
diff --git a/integration/firestore/package.json b/integration/firestore/package.json
index 73fc72ec219..31a3036403c 100644
--- a/integration/firestore/package.json
+++ b/integration/firestore/package.json
@@ -22,7 +22,7 @@
     "gulp": "4.0.2",
     "gulp-filter": "7.0.0",
     "gulp-replace": "1.1.4",
-    "typescript": "5.5.4",
+    "typescript": "5.9.3",
     "webpack-stream": "7.0.0"
   },
   "engines": {
diff --git a/package.json b/package.json
index 39455ef1161..23e0f311c13 100644
--- a/package.json
+++ b/package.json
@@ -155,7 +155,7 @@
     "tsec": "0.2.8",
     "tslint": "6.1.3",
     "typedoc": "0.16.11",
-    "typescript": "5.5.4",
+    "typescript": "5.9.3",
     "watch": "1.0.2",
     "webpack": "5.98.0",
     "yargs": "17.7.2"
diff --git a/packages/ai/package.json b/packages/ai/package.json
index b36081aa8f0..01e01c547b2 100644
--- a/packages/ai/package.json
+++ b/packages/ai/package.json
@@ -65,7 +65,7 @@
     "rollup": "2.79.2",
     "rollup-plugin-replace": "2.2.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/ai",
diff --git a/packages/analytics-compat/package.json b/packages/analytics-compat/package.json
index c978d3653cf..75e596f9cf8 100644
--- a/packages/analytics-compat/package.json
+++ b/packages/analytics-compat/package.json
@@ -26,7 +26,7 @@
     "rollup": "2.79.2",
     "@rollup/plugin-json": "6.1.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/analytics-compat",
diff --git a/packages/analytics-interop-types/package.json b/packages/analytics-interop-types/package.json
index d96eeff69d5..2cb0226c3b7 100644
--- a/packages/analytics-interop-types/package.json
+++ b/packages/analytics-interop-types/package.json
@@ -20,6 +20,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/analytics-types/package.json b/packages/analytics-types/package.json
index 2798c23b3fe..b8745407cfe 100644
--- a/packages/analytics-types/package.json
+++ b/packages/analytics-types/package.json
@@ -20,6 +20,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/analytics/package.json b/packages/analytics/package.json
index c8d359102f0..27461069a8b 100644
--- a/packages/analytics/package.json
+++ b/packages/analytics/package.json
@@ -54,7 +54,7 @@
     "@rollup/plugin-json": "6.1.0",
     "@rollup/plugin-node-resolve": "16.0.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/analytics",
diff --git a/packages/app-check-compat/package.json b/packages/app-check-compat/package.json
index d2b13f78d39..b107f3e8bec 100644
--- a/packages/app-check-compat/package.json
+++ b/packages/app-check-compat/package.json
@@ -49,7 +49,7 @@
     "@rollup/plugin-json": "6.1.0",
     "@rollup/plugin-node-resolve": "16.0.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/app-check",
diff --git a/packages/app-check-interop-types/package.json b/packages/app-check-interop-types/package.json
index c7e45614eea..8436356cec2 100644
--- a/packages/app-check-interop-types/package.json
+++ b/packages/app-check-interop-types/package.json
@@ -20,6 +20,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/app-check-types/package.json b/packages/app-check-types/package.json
index 92439788566..15687cbadce 100644
--- a/packages/app-check-types/package.json
+++ b/packages/app-check-types/package.json
@@ -20,6 +20,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/app-check/package.json b/packages/app-check/package.json
index a0e03d895cd..327f748a386 100644
--- a/packages/app-check/package.json
+++ b/packages/app-check/package.json
@@ -50,7 +50,7 @@
     "@rollup/plugin-json": "6.1.0",
     "@rollup/plugin-node-resolve": "16.0.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/app-check",
diff --git a/packages/app-compat/package.json b/packages/app-compat/package.json
index a27c1627811..edc77460593 100644
--- a/packages/app-compat/package.json
+++ b/packages/app-compat/package.json
@@ -48,7 +48,7 @@
     "@rollup/plugin-json": "6.1.0",
     "rollup-plugin-replace": "2.2.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/app-compat",
diff --git a/packages/app-types/package.json b/packages/app-types/package.json
index 4c49efb3512..66a5ef1fafc 100644
--- a/packages/app-types/package.json
+++ b/packages/app-types/package.json
@@ -24,6 +24,6 @@
     "@firebase/logger": "0.2.6"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/app/package.json b/packages/app/package.json
index 9d9d9d3d89e..318a5717436 100644
--- a/packages/app/package.json
+++ b/packages/app/package.json
@@ -52,7 +52,7 @@
     "rollup-plugin-replace": "2.2.0",
     "rollup-plugin-typescript2": "0.36.0",
     "rollup-plugin-dts": "5.3.1",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/app",
diff --git a/packages/auth-compat/package.json b/packages/auth-compat/package.json
index 83f02a17be4..f6f9a18d29c 100644
--- a/packages/auth-compat/package.json
+++ b/packages/auth-compat/package.json
@@ -63,7 +63,7 @@
     "rollup-plugin-replace": "2.2.0",
     "rollup-plugin-typescript2": "0.36.0",
     "selenium-webdriver": "4.30.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/auth-compat",
diff --git a/packages/auth-interop-types/package.json b/packages/auth-interop-types/package.json
index ecea25d0c00..e9921ad5fab 100644
--- a/packages/auth-interop-types/package.json
+++ b/packages/auth-interop-types/package.json
@@ -20,6 +20,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/auth-types/package.json b/packages/auth-types/package.json
index 66dced1d568..1f22e32a88a 100644
--- a/packages/auth-types/package.json
+++ b/packages/auth-types/package.json
@@ -24,6 +24,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/auth/package.json b/packages/auth/package.json
index 9a49314e2c1..70d47b0760b 100644
--- a/packages/auth/package.json
+++ b/packages/auth/package.json
@@ -142,7 +142,7 @@
     "rollup-plugin-typescript2": "0.36.0",
     "selenium-webdriver": "4.30.0",
     "totp-generator": "0.0.14",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/auth",
diff --git a/packages/component/package.json b/packages/component/package.json
index 2b475f12177..dbe196c5c07 100644
--- a/packages/component/package.json
+++ b/packages/component/package.json
@@ -38,7 +38,7 @@
   "devDependencies": {
     "rollup": "2.79.2",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/component",
diff --git a/packages/data-connect/package.json b/packages/data-connect/package.json
index 29459b94f4e..206f48bc083 100644
--- a/packages/data-connect/package.json
+++ b/packages/data-connect/package.json
@@ -58,7 +58,7 @@
     "@firebase/app": "0.14.3",
     "rollup": "2.79.2",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/data-connect",
diff --git a/packages/database-compat/package.json b/packages/database-compat/package.json
index 3c4460524be..60ceee74cca 100644
--- a/packages/database-compat/package.json
+++ b/packages/database-compat/package.json
@@ -58,7 +58,7 @@
   },
   "devDependencies": {
     "@firebase/app-compat": "0.5.3",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/database-compat",
diff --git a/packages/database-types/package.json b/packages/database-types/package.json
index b63337a0612..60b73c6d260 100644
--- a/packages/database-types/package.json
+++ b/packages/database-types/package.json
@@ -24,6 +24,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/database/package.json b/packages/database/package.json
index 305c42aac23..d2196af4dd9 100644
--- a/packages/database/package.json
+++ b/packages/database/package.json
@@ -60,7 +60,7 @@
     "@firebase/app": "0.14.3",
     "rollup": "2.79.2",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/database",
diff --git a/packages/firebase/package.json b/packages/firebase/package.json
index 7d4ab8682ac..93ef2473ea5 100644
--- a/packages/firebase/package.json
+++ b/packages/firebase/package.json
@@ -439,7 +439,7 @@
     "gulp": "4.0.2",
     "gulp-sourcemaps": "3.0.0",
     "gulp-replace": "1.1.4",
-    "typescript": "5.5.4",
+    "typescript": "5.9.3",
     "rollup-plugin-license": "3.5.3"
   },
   "components": [
diff --git a/packages/firestore-compat/package.json b/packages/firestore-compat/package.json
index 0787c21f397..c5a0c4864cb 100644
--- a/packages/firestore-compat/package.json
+++ b/packages/firestore-compat/package.json
@@ -61,7 +61,7 @@
     "rollup-plugin-typescript2": "0.36.0",
     "@rollup/plugin-node-resolve": "16.0.0",
     "ts-node": "10.9.2",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "license": "Apache-2.0",
   "typings": "dist/src/index.d.ts",
diff --git a/packages/firestore-types/package.json b/packages/firestore-types/package.json
index d1cf512ec53..0e66c87d213 100644
--- a/packages/firestore-types/package.json
+++ b/packages/firestore-types/package.json
@@ -24,6 +24,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/firestore/package.json b/packages/firestore/package.json
index 4001c19fe8c..5a77fdfc243 100644
--- a/packages/firestore/package.json
+++ b/packages/firestore/package.json
@@ -130,7 +130,7 @@
     "rollup-plugin-typescript2": "0.36.0",
     "rollup-plugin-dts": "5.3.1",
     "ts-node": "10.9.2",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/firestore",
diff --git a/packages/functions-compat/package.json b/packages/functions-compat/package.json
index fd5b482bb66..cc304c49540 100644
--- a/packages/functions-compat/package.json
+++ b/packages/functions-compat/package.json
@@ -33,7 +33,7 @@
     "rollup": "2.79.2",
     "@rollup/plugin-json": "6.1.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/functions-compat",
diff --git a/packages/functions-types/package.json b/packages/functions-types/package.json
index f06c4489e6a..0a77bdde749 100644
--- a/packages/functions-types/package.json
+++ b/packages/functions-types/package.json
@@ -20,6 +20,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/functions/package.json b/packages/functions/package.json
index 6099275f6cf..7343bc50e3f 100644
--- a/packages/functions/package.json
+++ b/packages/functions/package.json
@@ -53,7 +53,7 @@
     "rollup": "2.79.2",
     "@rollup/plugin-json": "6.1.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/functions",
diff --git a/packages/installations-compat/package.json b/packages/installations-compat/package.json
index 058f690f237..4e02b1c3496 100644
--- a/packages/installations-compat/package.json
+++ b/packages/installations-compat/package.json
@@ -51,7 +51,7 @@
     "@rollup/plugin-node-resolve": "16.0.0",
     "rollup-plugin-typescript2": "0.36.0",
     "rollup-plugin-uglify": "6.0.4",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "peerDependencies": {
     "@firebase/app-compat": "0.x"
diff --git a/packages/installations-types/package.json b/packages/installations-types/package.json
index fafe3b63102..aa8a334c363 100644
--- a/packages/installations-types/package.json
+++ b/packages/installations-types/package.json
@@ -23,6 +23,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/installations/package.json b/packages/installations/package.json
index a1b5db5bdce..3222ff53796 100644
--- a/packages/installations/package.json
+++ b/packages/installations/package.json
@@ -56,7 +56,7 @@
     "@rollup/plugin-node-resolve": "16.0.0",
     "rollup-plugin-typescript2": "0.36.0",
     "rollup-plugin-uglify": "6.0.4",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "peerDependencies": {
     "@firebase/app": "0.x"
diff --git a/packages/logger/package.json b/packages/logger/package.json
index f44fa21d524..47d8a8df039 100644
--- a/packages/logger/package.json
+++ b/packages/logger/package.json
@@ -37,7 +37,7 @@
   "devDependencies": {
     "rollup": "2.79.2",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/logger",
diff --git a/packages/messaging-compat/package.json b/packages/messaging-compat/package.json
index 643e1bd73e9..9d79d35ca1a 100644
--- a/packages/messaging-compat/package.json
+++ b/packages/messaging-compat/package.json
@@ -48,7 +48,7 @@
     "@rollup/plugin-json": "6.1.0",
     "rollup-plugin-typescript2": "0.36.0",
     "ts-essentials": "9.4.2",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/messaging",
diff --git a/packages/messaging-interop-types/package.json b/packages/messaging-interop-types/package.json
index 9df85275ae1..a7fe6354279 100644
--- a/packages/messaging-interop-types/package.json
+++ b/packages/messaging-interop-types/package.json
@@ -20,6 +20,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/messaging/package.json b/packages/messaging/package.json
index 4d475ebadfa..e782b9bc3ed 100644
--- a/packages/messaging/package.json
+++ b/packages/messaging/package.json
@@ -65,7 +65,7 @@
     "rollup-plugin-typescript2": "0.36.0",
     "@rollup/plugin-json": "6.1.0",
     "ts-essentials": "10.0.4",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/messaging",
diff --git a/packages/performance-compat/package.json b/packages/performance-compat/package.json
index 32c041916e2..1756cbbd4b9 100644
--- a/packages/performance-compat/package.json
+++ b/packages/performance-compat/package.json
@@ -50,7 +50,7 @@
     "@rollup/plugin-json": "6.1.0",
     "rollup-plugin-replace": "2.2.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4",
+    "typescript": "5.9.3",
     "@firebase/app-compat": "0.5.3"
   },
   "repository": {
diff --git a/packages/performance-types/package.json b/packages/performance-types/package.json
index 0d90a465501..1880a61d41f 100644
--- a/packages/performance-types/package.json
+++ b/packages/performance-types/package.json
@@ -12,7 +12,7 @@
     "index.d.ts"
   ],
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/performance-types",
diff --git a/packages/performance/package.json b/packages/performance/package.json
index cfbd414c0a4..67394c04f4e 100644
--- a/packages/performance/package.json
+++ b/packages/performance/package.json
@@ -51,7 +51,7 @@
     "rollup": "2.79.2",
     "@rollup/plugin-json": "6.1.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/performance",
diff --git a/packages/remote-config-compat/package.json b/packages/remote-config-compat/package.json
index b733ab07582..387b1e07c86 100644
--- a/packages/remote-config-compat/package.json
+++ b/packages/remote-config-compat/package.json
@@ -49,7 +49,7 @@
     "@rollup/plugin-json": "6.1.0",
     "rollup-plugin-replace": "2.2.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4",
+    "typescript": "5.9.3",
     "@firebase/app-compat": "0.5.3"
   },
   "repository": {
diff --git a/packages/remote-config-types/package.json b/packages/remote-config-types/package.json
index ec02d236ec9..1a1b0cad2d6 100644
--- a/packages/remote-config-types/package.json
+++ b/packages/remote-config-types/package.json
@@ -20,6 +20,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/remote-config/package.json b/packages/remote-config/package.json
index 963b23acdcc..0625377e11c 100644
--- a/packages/remote-config/package.json
+++ b/packages/remote-config/package.json
@@ -52,7 +52,7 @@
     "rollup": "2.79.2",
     "rollup-plugin-dts": "5.3.1",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/remote-config",
diff --git a/packages/storage-compat/package.json b/packages/storage-compat/package.json
index cf86443967c..d50f94855fe 100644
--- a/packages/storage-compat/package.json
+++ b/packages/storage-compat/package.json
@@ -49,7 +49,7 @@
     "rollup": "2.79.2",
     "@rollup/plugin-json": "6.1.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "files": [
     "dist"
diff --git a/packages/storage-types/package.json b/packages/storage-types/package.json
index 5addb80bc3b..3bae80e97a0 100644
--- a/packages/storage-types/package.json
+++ b/packages/storage-types/package.json
@@ -24,6 +24,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/storage/package.json b/packages/storage/package.json
index 6248ead4f5c..da70728ff2a 100644
--- a/packages/storage/package.json
+++ b/packages/storage/package.json
@@ -60,7 +60,7 @@
     "@rollup/plugin-alias": "5.1.1",
     "@rollup/plugin-json": "6.1.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/storage",
diff --git a/packages/template-types/package.json b/packages/template-types/package.json
index 2704ffab6bd..0de7716a442 100644
--- a/packages/template-types/package.json
+++ b/packages/template-types/package.json
@@ -21,6 +21,6 @@
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
   },
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   }
 }
diff --git a/packages/template/package.json b/packages/template/package.json
index 6ef9c2d81be..8574d7459bf 100644
--- a/packages/template/package.json
+++ b/packages/template/package.json
@@ -51,7 +51,7 @@
     "@firebase/app": "0.14.3",
     "rollup": "2.79.2",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/template",
diff --git a/packages/util/package.json b/packages/util/package.json
index 8c44efc4924..ea2a690d31f 100644
--- a/packages/util/package.json
+++ b/packages/util/package.json
@@ -50,7 +50,7 @@
     "@rollup/plugin-replace": "6.0.2",
     "rollup": "2.79.2",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/util",
diff --git a/packages/webchannel-wrapper/package.json b/packages/webchannel-wrapper/package.json
index bddf3cec8ed..71c4908ede4 100644
--- a/packages/webchannel-wrapper/package.json
+++ b/packages/webchannel-wrapper/package.json
@@ -37,7 +37,7 @@
     "rollup-plugin-copy": "3.5.0",
     "rollup-plugin-sourcemaps": "0.6.3",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "packages/webchannel-wrapper",
diff --git a/repo-scripts/changelog-generator/package.json b/repo-scripts/changelog-generator/package.json
index 8b3acaade05..677432f4c4f 100644
--- a/repo-scripts/changelog-generator/package.json
+++ b/repo-scripts/changelog-generator/package.json
@@ -23,7 +23,7 @@
   },
   "license": "Apache-2.0",
   "devDependencies": {
-    "typescript": "5.5.4"
+    "typescript": "5.9.3"
   },
   "repository": {
     "directory": "repo-scripts/changelog-generator",
diff --git a/repo-scripts/size-analysis/package.json b/repo-scripts/size-analysis/package.json
index dd71cc9a378..abc653f0320 100644
--- a/repo-scripts/size-analysis/package.json
+++ b/repo-scripts/size-analysis/package.json
@@ -34,7 +34,7 @@
     "rollup": "2.79.2",
     "rollup-plugin-replace": "2.2.0",
     "rollup-plugin-typescript2": "0.36.0",
-    "typescript": "5.5.4",
+    "typescript": "5.9.3",
     "webpack": "5.98.0",
     "webpack-virtual-modules": "0.6.2",
     "yargs": "17.7.2"
diff --git a/yarn.lock b/yarn.lock
index 213ecd4d2c9..4132814e264 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -16082,10 +16082,10 @@ typescript@3.7.x:
   resolved "https://registry.npmjs.org/typescript/-/typescript-3.7.7.tgz#c931733e2ec10dda56b855b379cc488a72a81199"
   integrity sha512-MmQdgo/XenfZPvVLtKZOq9jQQvzaUAUpcKW8Z43x9B2fOm4S5g//tPtMweZUIP+SoBqrVPEIm+dJeQ9dfO0QdA==
 
-typescript@5.5.4:
-  version "5.5.4"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-5.5.4.tgz#d9852d6c82bad2d2eda4fd74a5762a8f5909e9ba"
-  integrity sha512-Mtq29sKDAEYP7aljRgtPOpTvOfbwRWlS6dPRzwjdE+C0R4brX/GUyhHSecbHMFLNBLcJIPt9nl9yG5TZ1weH+Q==
+typescript@5.9.3:
+  version "5.9.3"
+  resolved "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz#5b4f59e15310ab17a216f5d6cf53ee476ede670f"
+  integrity sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==
 
 typescript@~4.1.3:
   version "4.1.6"