diff --git a/Gemfile.lock b/Gemfile.lock
index ac902aae9..b786149c0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -718,7 +718,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.5)
-    unicode-display_width (1.3.0)
+    unicode-display_width (1.4.0)
     unicorn (5.4.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)