diff --git a/build.sc b/build.sc
index 898acad..252abd5 100644
--- a/build.sc
+++ b/build.sc
@@ -437,7 +437,7 @@ object Deps {
     )
   }
   object smithy {
-    val smithyVersion = "1.37.0"
+    val smithyVersion = "1.40.0"
     val model = ivy"software.amazon.smithy:smithy-model:$smithyVersion"
     val build = ivy"software.amazon.smithy:smithy-build:$smithyVersion"
   }