diff --git a/migrations/Dockerfile b/migrations/Dockerfile
index 0d8cd2c..1784c0f 100644
--- a/migrations/Dockerfile
+++ b/migrations/Dockerfile
@@ -1,7 +1,7 @@
 FROM ghcr.io/jackc/tern:v2.3.2
 
-USER 1000:1000
 WORKDIR /migrations
 COPY . .
+ENV USER=1000
 
 ENTRYPOINT ["/tern"]