diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 2aefb39a325..e495e87eaad 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -60,7 +60,7 @@ jobs:
                   mdbook-version: "0.4.10"
 
             - name: Install mdbook extensions
-              run: cargo install mdbook-combiner mdbook-mermaid
+              run: cargo install mdbook-combiner@0.1.15 mdbook-mermaid
 
             - name: Prepare docs
               run: |