diff --git a/.github/workflows/gh_pages.yml b/.github/workflows/gh_pages.yml
index c6cd43458919e..0400081776e9b 100644
--- a/.github/workflows/gh_pages.yml
+++ b/.github/workflows/gh_pages.yml
@@ -17,7 +17,7 @@ jobs:
         repository: intel/llvm-docs
         path: docs
     - name: Install deps
-      run: sudo apt-get install -y doxygen graphviz ssh
+      run: sudo apt-get install -y doxygen graphviz ssh ninja-build
     - name: Build Docs
       run: |
         mkdir -p $GITHUB_WORKSPACE/build