diff --git a/.github/workflows/docsgen.yml b/.github/workflows/docsgen.yml
index b5f4354..137a193 100644
--- a/.github/workflows/docsgen.yml
+++ b/.github/workflows/docsgen.yml
@@ -17,6 +17,9 @@ jobs:
         repository: ${{github.repository}}.wiki
         path: BOSL2.wiki
 
+    - name: Install gifsicle
+      run: sudo brew install gifsicle
+
     - name: Install Pillow
       run: sudo pip3 install Pillow