diff --git a/.github/workflows/dev.yml b/.github/workflows/dev.yml
index ad2bebb..3309de7 100644
--- a/.github/workflows/dev.yml
+++ b/.github/workflows/dev.yml
@@ -67,7 +67,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install -r requirements.txt
-          pip install pyinstaller backports.tarfile
+          pip install pyinstaller backports.tarfile pillow
 
       - name: Generate version
         id: version