diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b1467c2ac9..8af450c682 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -171,7 +171,7 @@ jobs:
 
       - uses: denoland/setup-deno@v2
         with:
-          deno-version: v2.x
+          deno-version: v2.5.x
 
       - run: mkdir .coverage
 
@@ -222,7 +222,7 @@ jobs:
 
       - uses: denoland/setup-deno@v2
         with:
-          deno-version: v2.x
+          deno-version: v2.5.x
 
       - run: mkdir .coverage
 
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 7cf0160249..cf58d18e3b 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -41,7 +41,7 @@ jobs:
 
       - uses: denoland/setup-deno@v2
         with:
-          deno-version: v2.x
+          deno-version: v2.5.x
 
       - run: uv tool install pre-commit