diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 6bdc48de7..c6846aff8 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -22,7 +22,7 @@ smithy-version = "1.61.0"
 
 # testing
 junit-version = "5.13.4"
-kotest-version = "5.9.1"
+kotest-version = "6.0.0"
 kotlin-compile-testing-version = "0.8.0"
 kotlinx-benchmark-version = "0.4.14"
 kotlinx-serialization-version = "1.9.0"