diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 924c44b..2a20278 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -16,7 +16,7 @@ jobs:
         with:
           node-version: 17
       - run: corepack enable
-      - run: yarn 
+      - run: yarn --immutable
       - run: yarn poster:prod
       - run: cd ./packages/poster
       - uses: JS-DevTools/npm-publish@0f451a94170d1699fd50710966d48fb26194d939 # v1