diff --git a/project/plugins.sbt b/project/plugins.sbt
index 139ffeea..ef5e8f6a 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -2,7 +2,7 @@ addSbtPlugin("org.scalameta" % "sbt-mdoc" % "2.7.2")
 
 addSbtPlugin("com.thesamet" % "sbt-protoc" % "1.0.8")
 
-libraryDependencies += "com.thesamet.scalapb" %% "compilerplugin" % "0.11.8"
+libraryDependencies += "com.thesamet.scalapb" %% "compilerplugin" % "0.11.20"
 
 fullResolvers ~= {_.filterNot(_.name == "jcenter")}
 
diff --git a/src/setup.md b/src/setup.md
index 08fa1824..822cd0e8 100644
--- a/src/setup.md
+++ b/src/setup.md
@@ -15,7 +15,7 @@ import sbtprotoc.ProtocPlugin.autoImport._
 ```scala mdoc:silent
 addSbtPlugin("com.thesamet" % "sbt-protoc" % "1.0.8")
 
-libraryDependencies += "com.thesamet.scalapb" %% "compilerplugin" % "0.11.8"
+libraryDependencies += "com.thesamet.scalapb" %% "compilerplugin" % "0.11.20"
 ```
 
 次に`build.sbt`への設定の説明をします。