diff --git a/junit5-multiple-engines/build.gradle.kts b/junit5-multiple-engines/build.gradle.kts
index a75f99b6..2610b68f 100644
--- a/junit5-multiple-engines/build.gradle.kts
+++ b/junit5-multiple-engines/build.gradle.kts
@@ -59,7 +59,7 @@ dependencies {
     testRuntimeOnly("org.spekframework.spek2:spek-runner-junit5:$spekVersion")
 
     // Spock2
-    testImplementation("org.spockframework:spock-core:2.4-M4-groovy-4.0") {
+    testImplementation("org.spockframework:spock-core:2.4-M5-groovy-4.0") {
         because("allows Spock specifications to run")
     }
     testImplementation(platform("org.apache.groovy:groovy-bom:4.0.26")) {