diff --git a/Dockerfile b/Dockerfile
index 9027909d9881b2cb427ae5863d7339c339616ba8..49c84f50131ee54ae8cae3bbd0666b6b2344c04a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,4 +21,4 @@ RUN set -ex; \
             weird-birds/thunderbird_labels \
     ;
 
-RUN sed '/exec "$@"/i composer require -n --no-dev' docker-entrypoint.sh
+RUN sed '/exec "$@"/i composer require -n --no-dev' /docker-entrypoint.sh