diff --git a/codegen/smithy-kotlin-codegen/src/main/kotlin/software/amazon/smithy/kotlin/codegen/core/KotlinDependency.kt b/codegen/smithy-kotlin-codegen/src/main/kotlin/software/amazon/smithy/kotlin/codegen/core/KotlinDependency.kt
index 17faf0ad48..b575efae60 100644
--- a/codegen/smithy-kotlin-codegen/src/main/kotlin/software/amazon/smithy/kotlin/codegen/core/KotlinDependency.kt
+++ b/codegen/smithy-kotlin-codegen/src/main/kotlin/software/amazon/smithy/kotlin/codegen/core/KotlinDependency.kt
@@ -37,7 +37,7 @@ private fun getDefaultRuntimeVersion(): String {
 // publishing info
 const val RUNTIME_GROUP: String = "aws.smithy.kotlin"
 val RUNTIME_VERSION: String = System.getProperty("smithy.kotlin.codegen.clientRuntimeVersion", getDefaultRuntimeVersion())
-val KOTLIN_COMPILER_VERSION: String = System.getProperty("smithy.kotlin.codegen.kotlinCompilerVersion", "2.0.10")
+val KOTLIN_COMPILER_VERSION: String = System.getProperty("smithy.kotlin.codegen.kotlinCompilerVersion", "2.1.0")
 
 enum class SourceSet {
     CommonMain,
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index ef7137bb66..6ef5b35d57 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -13,7 +13,7 @@ okio-version = "3.9.1"
 otel-version = "1.45.0"
 slf4j-version = "2.0.16"
 slf4j-v1x-version = "1.7.36"
-crt-kotlin-version = "0.8.10"
+crt-kotlin-version = "0.9.0"
 micrometer-version = "1.14.2"
 binary-compatibility-validator-version = "0.16.3"