diff --git a/Gemfile.lock b/Gemfile.lock
index 0bfa85d9f1..d158e6db5b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -481,7 +481,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.8.2)
-    unicode-display_width (2.1.0)
+    unicode-display_width (2.2.0)
     unicorn (6.1.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)