diff --git a/.github/workflows/linting.yml b/.github/workflows/linting.yml
index c4a4f850e0..fdd385a23c 100644
--- a/.github/workflows/linting.yml
+++ b/.github/workflows/linting.yml
@@ -71,7 +71,7 @@ jobs:
 
       - name: Install Haystack
         run: |
-          pip install ".[all,dev]"
+          pip install ".[all,dev]" pydoc-markdown
           pip install ./haystack-linter
 
       - name: Pylint