diff --git a/build.gradle b/build.gradle
index 57ddf3e..bfb9726 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,6 +13,8 @@ java {
 	}
 }
 
+ext['tomcat.version'] = '11.0.22'
+
 configurations {
 	compileOnly {
 		extendsFrom annotationProcessor