diff --git a/Gemfile.lock b/Gemfile.lock
index bc2b332..65e4592 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -109,7 +109,7 @@ GEM
       image_processing (~> 1.1)
       mimemagic (>= 0.3.0)
       mini_mime (>= 0.1.3)
-    chartkick (3.3.1)
+    chartkick (3.4.0)
     childprocess (3.0.0)
     chronic (0.10.2)
     coderay (1.1.3)