diff --git a/Dockerfile b/Dockerfile
index 3f9910b..235b5d8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,7 @@ RUN cp /usr/share/zoneinfo/CET /etc/localtime && \
 
 ENV LANG=en_US.UTF-8 \
     LC_ALL=en_US.UTF-8 \
-    APPLICATION_VERSION 4.0.26
+    APPLICATION_VERSION=4.0.26
 
 EXPOSE 80