diff --git a/Gemfile.lock b/Gemfile.lock
index 930020e..5201780 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -65,7 +65,7 @@ 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)
     chromedriver-helper (2.1.1)
       archive-zip (~> 0.10)