diff --git a/lxc-apps/decidim/decidim.image b/lxc-apps/decidim/decidim.image
index 85a4b02..f014f2d 100644
--- a/lxc-apps/decidim/decidim.image
+++ b/lxc-apps/decidim/decidim.image
@@ -23,10 +23,10 @@ EOF
 COPY decidim.image.d
 
 RUN EOF
-    # Install gems required by decidim
+    # Install runtime gems and plugins
     cd /srv/decidim-app
     # Hackfix dependency
-    gem install graphql -v 1.9.21
+    sed -i '/^    graphql/d' Gemfile.lock
     bundle install
 
     # Setup delayed job for mail sending