diff --git a/.github/workflows/doc-build.yml b/.github/workflows/doc-build.yml
index 21c3ed0eec4..70ed2dbbe01 100644
--- a/.github/workflows/doc-build.yml
+++ b/.github/workflows/doc-build.yml
@@ -45,7 +45,6 @@ jobs:
     - name: install-pip
       run: |
         sudo pip3 install -U setuptools wheel pip
-        pip3 install -r scripts/requirements-base.txt
         pip3 install -r scripts/requirements-doc.txt
         pip3 install west==0.11.0
 
diff --git a/scripts/requirements-doc.txt b/scripts/requirements-doc.txt
index 8400552dfe1..b11f809f9d1 100644
--- a/scripts/requirements-doc.txt
+++ b/scripts/requirements-doc.txt
@@ -8,5 +8,6 @@ sphinxcontrib-svg2pdfconverter
 pygments~=2.9
 sphinx-notfound-page>=0.6
 
-# Used by zephyr_module
+# YAML validation. Used by zephyr_module.
+PyYAML>=5.1
 pykwalify