diff --git a/.drone.yml b/.drone.yml
index 0febd83..8ce7902 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -22,7 +22,7 @@ steps:
     settings:
       archive_format: gzip
       backend: filesystem
-      cache_key: volume
+      cache_key: '{{ .Repo.Name }}-{{ checksum "mix.lock" }}'
       mount:
         - _build
         - deps
@@ -47,7 +47,7 @@ steps:
     settings:
       archive_format: gzip
       backend: filesystem
-      cache_key: volume
+      cache_key: '{{ .Repo.Name }}-{{ checksum "mix.lock" }}'
       mount:
         - _build
         - deps