diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 09de258..7bc1acb 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -4,6 +4,8 @@ on:
   workflow_dispatch:
   push:
     branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
 
 env:
   REGISTRY: ghcr.io
@@ -53,7 +55,10 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: |
             type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:cache
-            type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:cache-${{ github.event_name }}
+            type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:cache-${{ env.TARGET_BRANCH }}
+            type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:cache-${{ github.ref_name }}
           cache-to: |
             type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:cache,mode=max
-            type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:cache-${{ github.event_name }},mode=max
+            type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:cache-${{ github.ref_name }},mode=max
+        env:
+          TARGET_BRANCH: ${{ github.base_ref || github.ref_name }}