diff --git a/assignment-client/src/Agent.cpp b/assignment-client/src/Agent.cpp
index 1805a414b5..fcd983873d 100644
--- a/assignment-client/src/Agent.cpp
+++ b/assignment-client/src/Agent.cpp
@@ -208,12 +208,14 @@ void Agent::run() {
         scriptURL = QUrl(_payload);
     }
    
-    NetworkAccessManager& networkManager = NetworkAccessManager::getInstance();
-    QNetworkReply *reply = networkManager.get(QNetworkRequest(scriptURL));
-    QNetworkDiskCache* cache = new QNetworkDiskCache(&networkManager);
+    NetworkAccessManager& networkAccessManager = NetworkAccessManager::getInstance();
+    QNetworkReply *reply = networkAccessManager.get(QNetworkRequest(scriptURL));
+    QNetworkDiskCache* cache = new QNetworkDiskCache(&networkAccessManager);
     QString cachePath = QStandardPaths::writableLocation(QStandardPaths::DataLocation);
     cache->setCacheDirectory(!cachePath.isEmpty() ? cachePath : "agentCache");
-    networkManager.setCache(cache);
+    QMetaObject::invokeMethod(&networkAccessManager, "setCache",
+                              Qt::BlockingQueuedConnection,
+                              Q_ARG(QAbstractNetworkCache*, cache));
     
     qDebug() << "Downloading script at" << scriptURL.toString();
     
diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index 10b6fc8165..7193a06125 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -317,7 +317,9 @@ Application::Application(int& argc, char** argv, QElapsedTimer &startup_time) :
     NetworkAccessManager& networkAccessManager = NetworkAccessManager::getInstance();
     QNetworkDiskCache* cache = new QNetworkDiskCache(&networkAccessManager);
     cache->setCacheDirectory(!cachePath.isEmpty() ? cachePath : "interfaceCache");
-    networkAccessManager.setCache(cache);
+    QMetaObject::invokeMethod(&networkAccessManager, "setCache",
+                              Qt::BlockingQueuedConnection,
+                              Q_ARG(QAbstractNetworkCache*, cache));
 
     ResourceCache::setRequestLimit(3);