diff --git a/.github/workflows/gen_docs.yml b/.github/workflows/gen_docs.yml
index 1332458..f46d6fa 100644
--- a/.github/workflows/gen_docs.yml
+++ b/.github/workflows/gen_docs.yml
@@ -21,7 +21,7 @@ jobs:
       run: sudo apt-get install python3-pip python3-dev python3-setuptools python3-pil gifsicle libfuse2
 
     - name: Install OpenSCAD-DocsGen package.
-      run: sudo pip3 install openscad-docsgen
+      run: sudo pip3 install openscad-docsgen imageio
 
     - name: Install OpenSCAD
       run: |
diff --git a/.github/workflows/gen_tutorials.yml b/.github/workflows/gen_tutorials.yml
index 0bc8e61..f67684e 100644
--- a/.github/workflows/gen_tutorials.yml
+++ b/.github/workflows/gen_tutorials.yml
@@ -21,7 +21,7 @@ jobs:
       run: sudo apt-get install python3-pip python3-dev python3-setuptools python3-pil gifsicle libfuse2
 
     - name: Install OpenSCAD-DocsGen package.
-      run: sudo pip3 install openscad-docsgen
+      run: sudo pip3 install openscad-docsgen imageio
 
     - name: Install OpenSCAD
       run: |
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8a5cab9..803adca 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -43,7 +43,7 @@ jobs:
       run: sudo apt-get install python3-pip python3-dev python3-setuptools python3-pil libfuse2
 
     - name: Install OpenSCAD-DocsGen package.
-      run: sudo pip3 install openscad-docsgen
+      run: sudo pip3 install openscad-docsgen imageio
 
     - name: Install OpenSCAD
       run: |