diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index c4e85c6..e39ede3 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -15,6 +15,14 @@ jobs:
         with:
           node-version: "20"
 
+      - name: Cache npm
+        uses: actions/cache@v4
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-npm-cache-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-npm-cache-
+
       - name: Install dependencies
         run: npm install
 
diff --git a/.github/workflows/format.yaml b/.github/workflows/format.yaml
index dff334b..952f5f6 100644
--- a/.github/workflows/format.yaml
+++ b/.github/workflows/format.yaml
@@ -15,8 +15,17 @@ jobs:
         with:
           node-version: "20"
 
+      - name: Cache npm
+        uses: actions/cache@v4
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-npm-cache-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-npm-cache-
+
       - name: Install dependencies
         run: npm install
 
       - name: Run format check
-        run: npm run format
+        run: |
+          npm run format