diff --git a/run/http4k-hello-world/build.gradle.kts b/run/http4k-hello-world/build.gradle.kts
index b835af58..437e77ce 100644
--- a/run/http4k-hello-world/build.gradle.kts
+++ b/run/http4k-hello-world/build.gradle.kts
@@ -8,7 +8,7 @@ repositories {
 }
 
 dependencies {
-    implementation("org.http4k:http4k-core:5.13.8.0")
+    implementation("org.http4k:http4k-core:5.13.9.0")
     implementation("org.http4k:http4k-server-undertow:5.13.8.0")
 }