diff --git a/Gemfile.lock b/Gemfile.lock
index 634fbac..a89a176 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -20,7 +20,7 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.9.0)
     rspec-support (3.9.3)
-    yard (0.9.14)
+    yard (0.9.20)
 
 PLATFORMS
   ruby