diff --git a/Gemfile.lock b/Gemfile.lock
index 01ece39a3..4cff253ee 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -167,7 +167,7 @@ GEM
       rack (>= 1.3)
     rainbow (3.1.1)
     rake (13.3.1)
-    rdoc (6.15.0)
+    rdoc (6.15.1)
       erb
       psych (>= 4.0.0)
       tsort