diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f95b54d1..2e03084a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,18 +19,15 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [2.7, "3.0", 3.1]
-
+        ruby: ["2.7", "3.0", "3.1"]
     steps:
       - uses: actions/checkout@v2
-
-      - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+      - run: rm Gemfile.lock
+      - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: ${{ matrix.ruby }}
+          ruby-version: ${{matrix.ruby}}
           bundler: latest
           bundler-cache: true
-
       - name: Run tests
         run: bin/test
 
@@ -42,6 +39,7 @@ jobs:
     runs-on: ${{matrix.plat}}-latest
     steps:
       - uses: actions/checkout@v2
+      - run: rm Gemfile.lock
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: "3.1"
diff --git a/.github/workflows/gem-install.yml b/.github/workflows/gem-install.yml
index f43b82aa..a875dc54 100644
--- a/.github/workflows/gem-install.yml
+++ b/.github/workflows/gem-install.yml
@@ -23,9 +23,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - run: rm Gemfile.lock
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.0"
+          ruby-version: "3.1"
           bundler: latest
           bundler-cache: true
       - run: "bundle exec rake gem:${{matrix.platform}}"
@@ -41,7 +42,7 @@ jobs:
     steps:
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.0"
+          ruby-version: "3.1"
       - uses: actions/download-artifact@v2
         with:
           name: gem-ruby
@@ -55,7 +56,7 @@ jobs:
     steps:
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.0"
+          ruby-version: "3.1"
       - uses: actions/download-artifact@v2
         with:
           name: gem-x86_64-linux
@@ -67,7 +68,7 @@ jobs:
     needs: ["package"]
     runs-on: ubuntu-latest
     container:
-      image: ruby:3.0-alpine
+      image: ruby:3.1-alpine
     steps:
       - uses: actions/download-artifact@v2
         with:
@@ -83,7 +84,7 @@ jobs:
     steps:
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.0"
+          ruby-version: "3.1"
       - uses: actions/download-artifact@v2
         with:
           name: gem-x86_64-darwin