diff --git a/tests/addon/package.json b/tests/addon/package.json
index 601abce..b67c140 100644
--- a/tests/addon/package.json
+++ b/tests/addon/package.json
@@ -41,7 +41,7 @@
     "loader.js": "^4.7.0",
     "qunit": "^2.19.1",
     "qunit-dom": "^2.0.0",
-    "typescript": "~4.7.4"
+    "typescript": "~4.9.4"
   },
   "engines": {
     "node": ">= 12.*"
diff --git a/tests/app/package.json b/tests/app/package.json
index 24a44be..c700355 100644
--- a/tests/app/package.json
+++ b/tests/app/package.json
@@ -36,7 +36,7 @@
     "loader.js": "^4.7.0",
     "qunit": "^2.19.1",
     "qunit-dom": "^2.0.0",
-    "typescript": "~4.7.4"
+    "typescript": "~4.9.4"
   },
   "engines": {
     "node": ">= 12.*"
diff --git a/tests/ts-module-a/package.json b/tests/ts-module-a/package.json
index effac9c..9e2fc15 100644
--- a/tests/ts-module-a/package.json
+++ b/tests/ts-module-a/package.json
@@ -10,6 +10,6 @@
     "@test/ts-module-b": "*"
   },
   "devDependencies": {
-    "typescript": "~4.7.4"
+    "typescript": "~4.9.4"
   }
 }
diff --git a/tests/ts-module-b/package.json b/tests/ts-module-b/package.json
index 8e1f1be..fe6a6fa 100644
--- a/tests/ts-module-b/package.json
+++ b/tests/ts-module-b/package.json
@@ -8,6 +8,6 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "typescript": "~4.7.4"
+    "typescript": "~4.9.4"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 3ea7486..60d5c6f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10252,10 +10252,10 @@ typescript-memoize@^1.0.0-alpha.3, typescript-memoize@^1.0.1:
   resolved "https://registry.yarnpkg.com/typescript-memoize/-/typescript-memoize-1.1.0.tgz#4a8f512d06fc995167c703a3592219901db8bc79"
   integrity sha512-LQPKVXK8QrBBkL/zclE6YgSWn0I8ew5m0Lf+XL00IwMhlotqRLlzHV+BRrljVQIc+NohUAuQP7mg4HQwrx5Xbg==
 
-typescript@~4.7.4:
-  version "4.7.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.7.4.tgz#1a88596d1cf47d59507a1bcdfb5b9dfe4d488235"
-  integrity sha512-C0WQT0gezHuw6AdY1M2jxUO83Rjf0HP7Sk1DtXj6j1EwkQNZrHAg2XPWlq62oqEhYvONq5pkC2Y9oPljWToLmQ==
+typescript@~4.9.4:
+  version "4.9.4"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.9.4.tgz#a2a3d2756c079abda241d75f149df9d561091e78"
+  integrity sha512-Uz+dTXYzxXXbsFpM86Wh3dKCxrQqUcVMxwU54orwlJjOpO3ao8L7j5lH+dWfTwgCwIuM9GQ2kvVotzYJMXTBZg==
 
 uc.micro@^1.0.1, uc.micro@^1.0.5:
   version "1.0.6"