diff --git a/build.gradle.kts b/build.gradle.kts
index 13c57c7..6e80017 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -26,7 +26,7 @@ dependencies {
     testImplementation("io.arrow-kt:arrow-core")
 
     testImplementation("io.gitlab.arturbosch.detekt:detekt-test:1.23.4")
-    testImplementation("io.kotest:kotest-assertions-core:5.8.1")
+    testImplementation("io.kotest:kotest-assertions-core:5.9.1")
     testImplementation("org.junit.jupiter:junit-jupiter:5.10.2")
 
     ktlint("com.pinterest:ktlint:0.50.0")