diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 8661869..da9f0e5 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -2,18 +2,30 @@ name: github pages
 
 on:
   push:
-    branches:
-      - master
+    tags:
+      - '*'
 
 jobs:
   deploy:
     runs-on: ubuntu-18.04
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
+
+      - name: Cache cargo registry
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Cache cargo index
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/git
+          key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
 
       - name: Build mdbook
-        run: cargo install mdbook        
-        
+        run: cargo install mdbook
+
       - name: Build
         run: mdbook build