diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e84df979..cdec57e9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -42,8 +42,7 @@ jobs:
       run: |
         gem install bundler:1.17.3
         bundle install --full-index
-        pip install python-frontmatter
-        pip install pillow
+        pip install python-frontmatter pillow python-dateutil
     - name: Check feature names and other data
       run: python3 check-boards.py
     - name: Check Image Dimensions