diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3d6da210..542ccbf1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,10 +12,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Java 21 (Temurin)
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
           java-version: '21'
           distribution: 'temurin'
@@ -49,10 +49,10 @@ jobs:
     needs: smoke
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Java 21 (Temurin)
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
           java-version: '21'
           distribution: 'temurin'
@@ -73,9 +73,9 @@ jobs:
         run: mvn -B install -DskipTests -Dgpg.skip=true
 
       - name: Set up Node.js (for vsce packaging in tools)
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
-          node-version: '20'
+          node-version: '24'
 
       - name: Build and verify tools/tinyexpression-p4-lsp-vscode
         run: mvn -B verify -Dgpg.skip=true
@@ -88,7 +88,7 @@ jobs:
       # verify で生成された VSIX を成果物として添付 (タグ push 時の
       # Release 添付は release-vsix.yml を参照)
       - name: Upload VSIX artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: tinyexpression-p4-lsp-vsix
           path: tools/tinyexpression-p4-lsp-vscode/target/*.vsix
diff --git a/.github/workflows/release-vsix.yml b/.github/workflows/release-vsix.yml
index 580fd563..8988fa1a 100644
--- a/.github/workflows/release-vsix.yml
+++ b/.github/workflows/release-vsix.yml
@@ -14,19 +14,19 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Set up JDK 21
-      uses: actions/setup-java@v4
+      uses: actions/setup-java@v5
       with:
         java-version: '21'
         distribution: 'temurin'
         cache: maven
 
     - name: Set up Node.js (for vsce)
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
-        node-version: '20'
+        node-version: '24'
 
     - name: Install tinyexpression to local repo
       run: mvn -B install -DskipTests -Dgpg.skip=true