diff --git a/core/Dockerfile b/core/Dockerfile
index 0622a33..02e919c 100644
--- a/core/Dockerfile
+++ b/core/Dockerfile
@@ -6,9 +6,8 @@ MAINTAINER Abhilash Raj
 # from the Gitlab.
 RUN apk update \
     && apk add --virtual build-deps gcc python3-dev musl-dev wget \
-	&& apk add postgresql-dev bash
-
-RUN wget -O mailman.zip https://gitlab.com/mailman/mailman/repository/archive.zip?ref=master  \
+	&& apk add postgresql-dev bash \
+    && wget -O mailman.zip https://gitlab.com/mailman/mailman/repository/archive.zip?ref=master  \
 	&& wget -O mailman_hyperkitty.zip https://gitlab.com/mailman/mailman-hyperkitty/repository/archive.zip?ref=master  \
 	&& pip install mailman.zip mailman_hyperkitty.zip psycopg2 \
 	&& rm mailman.zip mailman_hyperkitty.zip \