diff --git a/.github/actions/test_gem/action.yml b/.github/actions/test_gem/action.yml
index 401c30102..4fb1a7c22 100644
--- a/.github/actions/test_gem/action.yml
+++ b/.github/actions/test_gem/action.yml
@@ -66,7 +66,7 @@ runs:
     # ...but not for appraisals, sadly.
     - name: Install Ruby ${{ inputs.ruby }} with dependencies
       if: "${{ steps.setup.outputs.appraisals == 'false' }}"
-      uses: ruby/setup-ruby@v1.187.0
+      uses: ruby/setup-ruby@v1.188.0
       with:
         ruby-version: "${{ inputs.ruby }}"
         working-directory: "${{ steps.setup.outputs.gem_dir }}"
@@ -77,7 +77,7 @@ runs:
     # If we're using appraisals, do it all manually.
     - name: Install Ruby ${{ inputs.ruby }} without dependencies
       if: "${{ steps.setup.outputs.appraisals == 'true' }}"
-      uses: ruby/setup-ruby@v1.187.0
+      uses: ruby/setup-ruby@v1.188.0
       with:
         ruby-version: "${{ inputs.ruby }}"
         bundler:  "latest"