diff --git a/app/server/lib/NSandbox.ts b/app/server/lib/NSandbox.ts
index 65870166..5c75cf1d 100644
--- a/app/server/lib/NSandbox.ts
+++ b/app/server/lib/NSandbox.ts
@@ -173,6 +173,7 @@ export class NSandbox implements ISandbox {
       if (this._isWriteClosed) { resolve(); }
       this.childProc.on('error', reject);
       this.childProc.on('close', resolve);
+      this.childProc.on('exit', resolve);
       this._close();
     });
 
diff --git a/package.json b/package.json
index bf23acbd..ad933990 100644
--- a/package.json
+++ b/package.json
@@ -99,7 +99,7 @@
     "moment-timezone": "0.5.21",
     "morgan": "1.9.1",
     "mousetrap": "1.6.2",
-    "multiparty": "4.2.1",
+    "multiparty": "4.2.2",
     "node-fetch": "2.2.0",
     "numeral": "2.0.6",
     "plotly.js-basic-dist": "1.51.1",