diff --git a/Gemfile.lock b/Gemfile.lock
index 9f233e1..8b48d71 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -69,7 +69,7 @@ GEM
     rack (2.2.3)
     rake (13.0.1)
     rchardet (1.8.0)
-    rdoc (6.2.1)
+    rdoc (6.3.1)
     safe_yaml (1.0.5)
     semver2 (3.4.2)
     shoulda (4.0.0)