diff --git a/.drone.yml b/.drone.yml
index bb70bbd..e3aabd6 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -29,7 +29,7 @@ steps:
     settings:
       archive_format: gzip
       bucket: trainlog-cache
-      cache_key: '{{ .Repo.Name }}-{{ checksum ".tool-versions" }}-{{ checksum "mix.lock" }}'
+      cache_key: '{{ .Repo.Name }}-{{ checksum ".tool-versions" }}-{{ checksum "mix.lock" }}-{{ checksum "Dockerfile" }}'
       endpoint: minio:9000
       mount:
         - _build
@@ -139,7 +139,7 @@ steps:
     settings:
       archive_format: gzip
       bucket: trainlog-cache
-      cache_key: '{{ .Repo.Name }}-{{ checksum ".tool-versions" }}-{{ checksum "mix.lock" }}'
+      cache_key: '{{ .Repo.Name }}-{{ checksum ".tool-versions" }}-{{ checksum "mix.lock" }}-{{ checksum "Dockerfile" }}'
       endpoint: minio:9000
       exit_code: true
       mount: