diff --git a/Gemfile.lock b/Gemfile.lock
index ef1175222fe..62030ee1f59 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -455,7 +455,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.8)
-    unicode-display_width (2.0.0)
+    unicode-display_width (2.1.0)
     unicorn (6.0.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)