diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index fa3e97a772..1a5189e1de 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -248,7 +248,7 @@ GEM
       ethon (>= 0.9.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    unicode-display_width (1.4.1)
+    unicode-display_width (1.5.0)
     yell (2.0.7)
 
 PLATFORMS