diff --git a/Dockerfile b/Dockerfile
index 82e569c..c970761 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -20,7 +20,7 @@ ENV APP_ENV=prod
 WORKDIR /srv/app
 
 # php extensions installer: https://github.com/mlocati/docker-php-extension-installer
-COPY --from=mlocati/php-extension-installer /usr/bin/install-php-extensions /usr/local/bin/
+COPY --from=mlocati/php-extension-installer --link /usr/bin/install-php-extensions /usr/local/bin/
 
 # persistent / runtime deps
 RUN apk add --no-cache \