diff --git a/Dockerfile b/Dockerfile
index dc66c0a..71c76b5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,7 +27,7 @@ RUN echo 'gem: --no-document' >> ~/.gemrc && \
 
 # compile assets with temporary mysql server
 RUN export DATABASE_URL=mysql2://localhost/temp && \
-    export SECRET_TOKEN=thisisnotimportantnow && \
+    export SECRET_KEY_BASE=thisisnotimportantnow && \
     export DEBIAN_FRONTEND=noninteractive && \
     apt-get update && \
     apt-get install -y mysql-server && \