diff --git a/modules/api-definition/project/plugins.sbt b/modules/api-definition/project/plugins.sbt
index 30a36a3..ae3ed38 100644
--- a/modules/api-definition/project/plugins.sbt
+++ b/modules/api-definition/project/plugins.sbt
@@ -1,2 +1,2 @@
 addSbtPlugin("com.codecommit" % "sbt-github-packages" % "0.5.3")
-addSbtPlugin("com.disneystreaming.smithy4s" % "smithy4s-sbt-codegen" % "0.16.6")
+addSbtPlugin("com.disneystreaming.smithy4s" % "smithy4s-sbt-codegen" % "0.18.27")
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 5f31137..44e3969 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,3 +1,3 @@
 addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.8.18")
 addSbtPlugin("com.codecommit" % "sbt-github-packages" % "0.5.3")
-addSbtPlugin("com.disneystreaming.smithy4s" % "smithy4s-sbt-codegen" % "0.16.6")
+addSbtPlugin("com.disneystreaming.smithy4s" % "smithy4s-sbt-codegen" % "0.18.27")