diff --git a/Gemfile.lock b/Gemfile.lock
index 60d42d7..3233a22 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -257,7 +257,7 @@ GEM
       concurrent-ruby (~> 1.0)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.9)
+    unf_ext (0.0.9.1)
     unicode-display_width (1.8.0)
     webrick (1.8.1)