diff --git a/.github/workflows/github-pages.yml b/.github/workflows/github-pages.yml
index 323f7a0..147166b 100644
--- a/.github/workflows/github-pages.yml
+++ b/.github/workflows/github-pages.yml
@@ -9,14 +9,14 @@ jobs:
       id-token: write
     environment: github-pages
     runs-on: ubuntu-latest
-    container: alpine
+    container: alpine@sha256:beefdbd8a1da6d2915566fde36db9db0b524eb737fc57cd1367effd16dc0d06d
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - name: Build
         run: |
           apk add mdbook tar
           mdbook build
-      - uses: actions/upload-pages-artifact@v3
+      - uses: actions/upload-pages-artifact@56afc609e74202658d3ffba0e8f6dda462b719fa # v3
         with:
           path: book
-      - uses: actions/deploy-pages@v4
+      - uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4
diff --git a/package-lock.json b/package-lock.json
index 539704d..8275fee 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,8 +12,8 @@
         "templates/*"
       ],
       "devDependencies": {
-        "markdown-link-check": "^3.12.2",
-        "prettier": "^3.3.3"
+        "markdown-link-check": "3.12.2",
+        "prettier": "3.3.3"
       }
     },
     "node_modules/@tootallnate/quickjs-emscripten": {
diff --git a/package.json b/package.json
index 249b240..e65a517 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "format": "prettier --write ."
   },
   "devDependencies": {
-    "markdown-link-check": "^3.12.2",
-    "prettier": "^3.3.3"
+    "markdown-link-check": "3.12.2",
+    "prettier": "3.3.3"
   }
 }