diff --git a/Gemfile.lock b/Gemfile.lock
index c03e1c3..ee50907 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,7 +61,7 @@ GEM
     chartable (0.0.0.3)
       activesupport (>= 3.0.0)
       chronic (~> 0.10)
-    chartkick (3.3.1)
+    chartkick (3.4.0)
     chronic (0.10.2)
     coffee-rails (4.2.2)
       coffee-script (>= 2.2.0)