diff --git a/spring-boot-project/spring-boot-dependencies/build.gradle b/spring-boot-project/spring-boot-dependencies/build.gradle
index 5b735581679..cc54c4d2edf 100644
--- a/spring-boot-project/spring-boot-dependencies/build.gradle
+++ b/spring-boot-project/spring-boot-dependencies/build.gradle
@@ -1079,6 +1079,10 @@ bom {
 		}
 	}
 	library("Kotlin Coroutines", "1.8.1") {
+		prohibit {
+			versionRange "[1.9.0,)"
+			because "it requires Kotlin 2"
+		}
 		group("org.jetbrains.kotlinx") {
 			imports = [
 				"kotlinx-coroutines-bom"