diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 32ab53ba..8cff4c53 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -55,7 +55,7 @@ jobs:
     - name: Install dependencies
       shell: bash
       run: |
-        gem install --no-document toys
+        gem install --no-document toys -v '~> 0.22.0'
         bundle install
     - name: Test ${{ matrix.task }}
       shell: bash
diff --git a/.kokoro/samples.sh b/.kokoro/samples.sh
index 50ae3929..6aa4455a 100755
--- a/.kokoro/samples.sh
+++ b/.kokoro/samples.sh
@@ -7,7 +7,7 @@ set -eo pipefail
 export GEM_HOME=$HOME/.gem
 export PATH=$GEM_HOME/bin:$PATH
 
-gem install --no-document toys
+gem install --no-document toys -v '~> 0.22.0'
 
 # To run acceptance tests for samples, we need the `sample_loader.rb` helper
 # from the `googleapis/ruby-common-tools` repository.
diff --git a/.toys/.toys.rb b/.toys/.toys.rb
index 9f76ff2a..855c075a 100644
--- a/.toys/.toys.rb
+++ b/.toys/.toys.rb
@@ -49,7 +49,7 @@ def run
     exec ["bundle", "exec", "yard", "doc"]
   end
 end
-alias_tool :yard, :yardoc
+tool "yard", delegate_to: "yardoc"
 
 expand :gem_build