diff --git a/Dockerfile b/Dockerfile
index e7e7f07..0d4dfc6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ ENV NEXTCLOUD_UPDATE 1
 ENV NEXTCLOUD_ADMIN_USER repod
 ENV NEXTCLOUD_ADMIN_PASSWORD repod
 ENV SQLITE_DATABASE repod
-ARG GPODDERSYNC_VERSION 3.8.1
+ENV GPODDERSYNC_VERSION 3.8.1
 
 RUN curl -fsSL https://deb.nodesource.com/setup_16.x | bash - && \
     apt-get install -y nodejs && \