diff --git a/pica-mattermost/Dockerfile b/pica-mattermost/Dockerfile
index be7137c8fb443f839d142997545f30489ebbc285..8eab834fcbe201f3fbde65dcad923b658b4d0859 100644
--- a/pica-mattermost/Dockerfile
+++ b/pica-mattermost/Dockerfile
@@ -22,6 +22,7 @@ RUN apk add --no-cache \
 	netcat-openbsd \
 	xmlsec-dev \
 	tzdata \
+	postgresql-client \
 	&& rm -rf /tmp/*
 
 # Get Mattermost