diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 181e2de..b17da34 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -142,7 +142,7 @@ jobs:
       - name: install cargo-rdme
         uses: taiki-e/install-action@v2
         with:
-          tool: cargo-rdme
+          tool: cargo-rdme@1.5.1
 
       - name: check crate READMEs
         shell: bash