diff --git a/Dockerfile b/Dockerfile
index f91efee..c280fd9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,6 +10,7 @@ RUN adduser -D -u 1000 -G deploy deploy
 # switch to the created user and install the application
 USER deploy
 ENV PATH "$PATH:/home/deploy/.local/bin"
+ENV MOINMOIN_DATA_BASE_DIR "/data/wikis"
 
 COPY . /app
 WORKDIR /app