diff --git a/build.gradle.kts b/build.gradle.kts
index eb627b71..1d9ba2a6 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -78,7 +78,7 @@ dependencies {
     testImplementation(libs.mockserver.netty)
 
     constraints {
-        implementation("io.undertow:undertow-core:2.3.15.Final") { // keycloak
+        implementation("io.undertow:undertow-core:2.3.18.Final") { // keycloak
             because("https://security.snyk.io/vuln/SNYK-JAVA-IOUNDERTOW-6567186")
         }
         implementation("org.bouncycastle:bcprov-jdk18on:1.78.1") { // keycloak