diff --git a/index.js b/index.js
index 8c85c74..425ddab 100644
--- a/index.js
+++ b/index.js
@@ -151,6 +151,8 @@ const defaultKill = (input, options) => {
 
 	if (options.force) {
 		arguments_.unshift('-9');
+	} else {
+		arguments_.unshift('-15');
 	}
 
 	if (killByName && options.ignoreCase) {