diff --git a/lib/monitor/run.js b/lib/monitor/run.js
index 9815af49..6dc37f94 100644
--- a/lib/monitor/run.js
+++ b/lib/monitor/run.js
@@ -290,15 +290,21 @@ function kill(child, signal, callback) {
     // an array of PIDs that have spawned under nodemon, and we send each the
     // configured signal (default: SIGUSR2) signal, which fixes #335
     // note that psTree also works if `ps` is missing by looking in /proc
+    const sig = signal.replace('SIG', '');
     psTree(child.pid, function (err, kids) {
-      // make sure we kill from smallest to largest
-      const pids = kids.map(p => p.PID).concat(child.pid).sort();
-
-      pids.forEach(pid => {
-        exec('kill -' + signals[signal] + ' ' + pid, () => {});
-      });
-      callback();
+      if (psTree.hasPS) {
+        spawn('kill', ['-s', sig, child.pid].concat(kids.map(p => p.PID)))
+          .on('close', callback);
+      } else {
+        // make sure we kill from smallest to largest
+        const pids = kids.map(p => p.PID).concat(child.pid).sort();
+        pids.forEach(pid => {
+          exec('kill -' + signals[signal] + ' ' + pid, () => { });
+        });
+        callback();
+      }
     });
+
   }
 }
 
diff --git a/package-lock.json b/package-lock.json
index 4ba07d36..d6baeba0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -48,9 +48,9 @@
       }
     },
     "@remy/pstree": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/@remy/pstree/-/pstree-1.0.1.tgz",
-      "integrity": "sha1-Qgq7YTxyzSn4xZW9fWxVaRu5aRA=",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@remy/pstree/-/pstree-1.1.0.tgz",
+      "integrity": "sha512-3rxECj41p0Qkdgoc50VnZpSDTXS+UZGRzTTO+qb3TiZDhuZMmf4z/wApcIeJ878okVq7D9phadgXQD9Kvbq3tQ==",
       "requires": {
         "ps-tree": "1.1.0"
       }
diff --git a/package.json b/package.json
index 5841da83..e0bc97c3 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "should": "~4.0.0"
   },
   "dependencies": {
-    "@remy/pstree": "^1.0.1",
+    "@remy/pstree": "^1.1.0",
     "chokidar": "^1.7.0",
     "debug": "^2.6.8",
     "es6-promise": "^3.3.1",