diff --git a/CHANGELOG.md b/CHANGELOG.md
index 92d70984de..5ff23e2329 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@
 > - :house: [Internal]
 > - :nail_care: [Polish]
 
+# 12.0.0-beta.1 (Unreleased)
+
 # 12.0.0-alpha.15
 
 #### :boom: Breaking Change
diff --git a/compiler/common/bs_version.ml b/compiler/common/bs_version.ml
index faf399f142..e5a530ad53 100644
--- a/compiler/common/bs_version.ml
+++ b/compiler/common/bs_version.ml
@@ -21,6 +21,6 @@
  * You should have received a copy of the GNU Lesser General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *)
-let version = "12.0.0-alpha.15"
+let version = "12.0.0-beta.1"
 let header = "// Generated by ReScript, PLEASE EDIT WITH CARE"
 let package_name = ref "rescript"
diff --git a/package.json b/package.json
index b82b02f895..c3a2e419b3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rescript",
-  "version": "12.0.0-alpha.15",
+  "version": "12.0.0-beta.1",
   "description": "ReScript toolchain",
   "type": "module",
   "keywords": [
diff --git a/packages/@rescript/darwin-arm64/package.json b/packages/@rescript/darwin-arm64/package.json
index 9cf7e758da..3d65226ce0 100644
--- a/packages/@rescript/darwin-arm64/package.json
+++ b/packages/@rescript/darwin-arm64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rescript/darwin-arm64",
-  "version": "12.0.0-alpha.15",
+  "version": "12.0.0-beta.1",
   "description": "ReScript binaries for MacOS ARM64",
   "type": "module",
   "homepage": "https://rescript-lang.org",
diff --git a/packages/@rescript/darwin-x64/package.json b/packages/@rescript/darwin-x64/package.json
index 6a4e7e408f..825140118c 100644
--- a/packages/@rescript/darwin-x64/package.json
+++ b/packages/@rescript/darwin-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rescript/darwin-x64",
-  "version": "12.0.0-alpha.15",
+  "version": "12.0.0-beta.1",
   "description": "ReScript binaries for MacOS x86_64",
   "type": "module",
   "homepage": "https://rescript-lang.org",
diff --git a/packages/@rescript/linux-arm64/package.json b/packages/@rescript/linux-arm64/package.json
index 682093c125..3074e83f5a 100644
--- a/packages/@rescript/linux-arm64/package.json
+++ b/packages/@rescript/linux-arm64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rescript/linux-arm64",
-  "version": "12.0.0-alpha.15",
+  "version": "12.0.0-beta.1",
   "description": "ReScript binaries for Linux ARM64",
   "type": "module",
   "homepage": "https://rescript-lang.org",
diff --git a/packages/@rescript/linux-x64/package.json b/packages/@rescript/linux-x64/package.json
index 3b5223c31f..a9495b9ee4 100644
--- a/packages/@rescript/linux-x64/package.json
+++ b/packages/@rescript/linux-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rescript/linux-x64",
-  "version": "12.0.0-alpha.15",
+  "version": "12.0.0-beta.1",
   "description": "ReScript binaries for Linux x86_64",
   "type": "module",
   "homepage": "https://rescript-lang.org",
diff --git a/packages/@rescript/win32-x64/package.json b/packages/@rescript/win32-x64/package.json
index c6846881cb..f0ed2d48fc 100644
--- a/packages/@rescript/win32-x64/package.json
+++ b/packages/@rescript/win32-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rescript/win32-x64",
-  "version": "12.0.0-alpha.15",
+  "version": "12.0.0-beta.1",
   "description": "ReScript binaries for Windows x86_64",
   "type": "module",
   "homepage": "https://rescript-lang.org",
diff --git a/packages/std/package.json b/packages/std/package.json
index 6f181428e2..d468f01ed1 100644
--- a/packages/std/package.json
+++ b/packages/std/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rescript/std",
-  "version": "12.0.0-alpha.15",
+  "version": "12.0.0-beta.1",
   "keywords": [
     "rescript",
     "stdlib",
diff --git a/rewatch/Cargo.lock b/rewatch/Cargo.lock
index 1a5f703ee1..0f37078773 100644
--- a/rewatch/Cargo.lock
+++ b/rewatch/Cargo.lock
@@ -746,7 +746,7 @@ checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
 
 [[package]]
 name = "rewatch"
-version = "12.0.0-alpha.15"
+version = "12.0.0-beta.1"
 dependencies = [
  "ahash",
  "anyhow",
diff --git a/rewatch/Cargo.toml b/rewatch/Cargo.toml
index cd8c2ae21a..da655742fa 100644
--- a/rewatch/Cargo.toml
+++ b/rewatch/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rewatch"
-version = "12.0.0-alpha.15"
+version = "12.0.0-beta.1"
 edition = "2024"
 
 [dependencies]
diff --git a/yarn.config.cjs b/yarn.config.cjs
index 21b399d1cd..fe60bd3bcc 100644
--- a/yarn.config.cjs
+++ b/yarn.config.cjs
@@ -14,7 +14,7 @@ const execPromise = util.promisify(exec);
  * @param {Yarn.Constraints.Context} ctx
  */
 async function enforceCompilerMeta({ Yarn }) {
-  const EXPECTED_VERSION = "12.0.0-alpha.15";
+  const EXPECTED_VERSION = "12.0.0-beta.1";
 
   for (const workspace of Yarn.workspaces()) {
     const { ident } = workspace.pkg;