diff --git a/Dockerfile b/Dockerfile
index 7370409..32e02a1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -100,8 +100,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   && mkdir /var/log/supervisord /var/run/supervisord
 COPY supervisord.conf /etc/supervisord.conf
 
-COPY ./app.json /app/app.json
-COPY ./postdeploy.sh /app/postdeploy.sh
+COPY --chmod=755 ./postdeploy.sh /app/postdeploy.sh
+COPY --chmod=755 ./postdeploy_hook.sh /docker-entrypoint-hooks.d/post-installation/postdeploy_hook.sh
 
 ENV NEXTCLOUD_UPDATE=1
 
diff --git a/app.json b/app.json
deleted file mode 100644
index 9c60d3c..0000000
--- a/app.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "scripts": {
-    "dokku": {
-      "postdeploy": "su -l -s /bin/sh www-data -c /app/postdeploy.sh"
-    }
-  }
-}
diff --git a/postdeploy_hook.sh b/postdeploy_hook.sh
new file mode 100755
index 0000000..226408b
--- /dev/null
+++ b/postdeploy_hook.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+su -l -s /bin/sh www-data -c /app/postdeploy.sh
+