diff --git a/.github/workflows/build_publish_tools_container.yml b/.github/workflows/build_publish_tools_container.yml
index ab486df..79d8cd7 100644
--- a/.github/workflows/build_publish_tools_container.yml
+++ b/.github/workflows/build_publish_tools_container.yml
@@ -2,6 +2,8 @@ name: Create and publish a Docker image of our mdbook tools
 
 on:
   push:
+    paths:
+      - tools_container
     branches:
       - 'master'
     tags: