diff --git a/commit-watcher/Dockerfile b/commit-watcher/Dockerfile
index 4fb6a28..866e124 100644
--- a/commit-watcher/Dockerfile
+++ b/commit-watcher/Dockerfile
@@ -17,7 +17,6 @@ RUN	set -x \
 	libxslt-dev \
 	&& git clone --depth 1 https://github.com/srcclr/commit-watcher.git /usr/src/commit-watcher \
 	&& cd /usr/src/commit-watcher \
-	&& gem install io-console --no-rdoc --no-ri \
 	&& bundle config build.nokogiri --use-system-libraries \
 	&& bundle install \
 	&& apk del .build-deps