diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bc936dd..02ae1f5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
           bun-version: latest
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v6.4.0
         with:
           node-version-file: ".node-version"
 
@@ -82,7 +82,7 @@ jobs:
           bun-version: latest
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v6.4.0
         with:
           node-version-file: ".node-version"
 
@@ -133,7 +133,7 @@ jobs:
 
       - name: Setup Node.js
         if: matrix.node-version
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v6.4.0
         with:
           node-version: ${{ matrix.node-version }}
 
diff --git a/.github/workflows/mcp-release.yml b/.github/workflows/mcp-release.yml
index 57db9d3..2407455 100644
--- a/.github/workflows/mcp-release.yml
+++ b/.github/workflows/mcp-release.yml
@@ -46,7 +46,7 @@ jobs:
           bun-version: latest
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v6.4.0
         with:
           node-version-file: ".node-version"
           registry-url: "https://registry.npmjs.org"
@@ -97,7 +97,7 @@ jobs:
           bun-version: latest
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v6.4.0
         with:
           node-version-file: ".node-version"
           registry-url: "https://registry.npmjs.org"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index e324814..95aee5e 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -67,7 +67,7 @@ jobs:
 
             - name: Setup Node.js
               if: steps.version.outputs.should_release == 'true'
-              uses: actions/setup-node@v6
+              uses: actions/setup-node@v6.4.0
               with:
                   node-version-file: ".node-version"
                   registry-url: "https://registry.npmjs.org"