diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index db22f41..f752174 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -21,7 +21,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout
-              uses: actions/checkout@v6
+              uses: actions/checkout@v6.0.3
   
             - name: Detect package manager
               id: detect-package-manager
@@ -42,13 +42,13 @@ jobs:
                   fi
 
             - name: Setup Node
-              uses: actions/setup-node@v6
+              uses: actions/setup-node@v6.5.0
               with:
                   node-version: "20.20.1"
                   cache: ${{ steps.detect-package-manager.outputs.manager }}
 
             - name: Restore cache
-              uses: actions/cache@v5
+              uses: actions/cache@v5.1.0
               with:
                   path: |
                       .next/cache
@@ -63,7 +63,7 @@ jobs:
               run: ${{ steps.detect-package-manager.outputs.runner }} next build
 
             - name: Upload artifact
-              uses: actions/upload-pages-artifact@v4
+              uses: actions/upload-pages-artifact@v4.0.0
               with:
                   path: ./out
 
@@ -77,4 +77,4 @@ jobs:
         steps:
             - name: Deploy to GitHub Pages
               id: deployment
-              uses: actions/deploy-pages@v4
+              uses: actions/deploy-pages@v4.0.5
diff --git a/package-lock.json b/package-lock.json
index 812c0b6..27eee61 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -26,7 +26,7 @@
         "three": "0.185.1"
       },
       "devDependencies": {
-        "@tailwindcss/postcss": "^4.3.3",
+        "@tailwindcss/postcss": "4.3.3",
         "@types/node": "26.1.1",
         "@types/react": "19.2.14",
         "@types/react-dom": "19.2.3",
diff --git a/package.json b/package.json
index d1a6f85..d9fb46c 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "three": "0.185.1"
   },
   "devDependencies": {
-    "@tailwindcss/postcss": "^4.3.3",
+    "@tailwindcss/postcss": "4.3.3",
     "@types/node": "26.1.1",
     "@types/react": "19.2.14",
     "@types/react-dom": "19.2.3",