diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index c9e01e903a6..79acf6e26e7 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,18 +11,13 @@ jobs:
       uses: actions/checkout@v2.4.0
 
     - name: Set up Ruby
-      uses: actions/setup-ruby@v1.1.3
+      uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: true
 
     - name: Set up Node
       uses: actions/setup-node@v2.5.1
 
-    - name: Restore bundler cache
-      uses: actions/cache@v2.1.7
-      with:
-        path: vendor/gems
-        key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
-        restore-keys: ${{ runner.os }}-gems-
-
     - name: Bootstrap
       run: script/bootstrap
 
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 00000000000..a603bb50a29
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+2.7.5