diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 37e530e..5b385b5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,7 +20,7 @@ jobs:
       - uses: actions/setup-node@v3
         with:
           node-version-file: '.nvmrc'
-          cache: "yarn"
+          cache: 'pnpm'
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
diff --git a/.github/workflows/post-tweet-to-mastodon.yml b/.github/workflows/post-tweet-to-mastodon.yml
index 3159cf0..fdb75f9 100644
--- a/.github/workflows/post-tweet-to-mastodon.yml
+++ b/.github/workflows/post-tweet-to-mastodon.yml
@@ -20,7 +20,7 @@ jobs:
       - uses: actions/setup-node@v3
         with:
           node-version-file: '.nvmrc'
-          cache: "yarn"
+          cache: 'pnpm'
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile