diff --git a/codegen/gradle/libs.versions.toml b/codegen/gradle/libs.versions.toml
index 5609f921..d36b7f05 100644
--- a/codegen/gradle/libs.versions.toml
+++ b/codegen/gradle/libs.versions.toml
@@ -1,6 +1,6 @@
 [versions]
 junit5 = "6.0.2"
-smithy = "1.65.0"
+smithy = "1.66.0"
 mockito = "5.21.0"
 test-logger-plugin = "4.0.0"
 spotbugs = "6.0.22"