diff --git a/core/Dockerfile b/core/Dockerfile
index 38c5f0e..0461cb3 100644
--- a/core/Dockerfile
+++ b/core/Dockerfile
@@ -6,7 +6,7 @@ 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 su-exec \
+    && apk add postgresql-dev bash su-exec postgresql-client \
     && wget -O mailman_hyperkitty.zip https://gitlab.com/mailman/mailman-hyperkitty/repository/archive.zip?ref=master  \
     && pip install mailman_hyperkitty.zip psycopg2 mailman==3.1.0rc1 \
     && rm mailman_hyperkitty.zip \