1 files changed, 3 insertions, 0 deletions
diff --git a/Gemfile b/Gemfile
index a49e6912986..a0f5b70de32 100644
--- a/Gemfile
+++ b/Gemfile
@@ -154,6 +154,9 @@ gem "slack-notifier", "~> 1.0.0"
 # d3
 gem "d3_rails", "~> 3.1.4"
 
+#cal-heatmap
+gem "cal-heatmap-rails", "~> 0.0.1"
+
 # underscore-rails
 gem "underscore-rails", "~> 1.4.4"