diff --git a/Gemfile.lock b/Gemfile.lock
index 94be963..e31f0a0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -62,7 +62,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (~> 1.5)
       xpath (~> 3.2)
-    chartkick (3.3.1)
+    chartkick (3.4.0)
     childprocess (3.0.0)
     choice (0.2.0)
     coffee-rails (4.2.2)