diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index f6cbcac..7f5a71f 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -30,10 +30,11 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: dorny/paths-filter@v2.5.1
-        id: changes
+        id: filter
         with:
           filters: |
-            src:
+            docker:
               - 'Dockerfile'
       - name: Build image
+        if: steps.filter.outputs.docker == 'true'
         run: docker build .