diff --git a/project/plugins.sbt b/project/plugins.sbt
index 3cb64c4..f7e8b73 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,6 +1,6 @@
 addSbtPlugin("com.codecommit"    % "sbt-github-actions"  % "0.10.1")
 addSbtPlugin("com.eed3si9n"      % "sbt-unidoc"          % "0.4.3")
 addSbtPlugin("com.geirsson"      % "sbt-ci-release"      % "1.5.7")
-addSbtPlugin("org.scalameta"     % "sbt-mdoc"            % "2.2.20")
+addSbtPlugin("org.scalameta"     % "sbt-mdoc"            % "2.2.21")
 addSbtPlugin("org.scoverage"     % "sbt-scoverage"       % "1.8.2")
 addSbtPlugin("com.typesafe.sbt"  % "sbt-git"             % "1.0.0")