diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index e66ada3c729..6a0cb8aa498 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -12,8 +12,8 @@ atomicfu-version = "0.29.0"
 binary-compatibility-validator-version = "0.18.0"
 
 # smithy-kotlin codegen and runtime are versioned separately
-smithy-kotlin-runtime-version = "1.5.19"
-smithy-kotlin-codegen-version = "0.35.19"
+smithy-kotlin-runtime-version = "1.5.20"
+smithy-kotlin-codegen-version = "0.35.20"
 
 # codegen
 smithy-version = "1.62.0"