diff --git a/.github/workflows/build-tugboat.yml b/.github/workflows/build-tugboat.yml
index ec7abf7..5928c4f 100644
--- a/.github/workflows/build-tugboat.yml
+++ b/.github/workflows/build-tugboat.yml
@@ -7,6 +7,7 @@ on:
       - ".github/workflows/build-tugboat.yml"
       - ".github/workflows/build-docker.yml"
       - "!.github/workflows/deploy.yml"
+      - "Dockerfile"
       # Source code and dependency changes
       - "tugboat/**"
       # Workspace dependencies might update