diff --git a/src/core/http/types.h b/src/core/http/types.h
index 5a2d9cf49..e86330fec 100644
--- a/src/core/http/types.h
+++ b/src/core/http/types.h
@@ -46,7 +46,8 @@ namespace Http
     const QString CONTENT_TYPE_CSS = "text/css; charset=UTF-8";
     const QString CONTENT_TYPE_GIF = "image/gif";
     const QString CONTENT_TYPE_HTML = "text/html; charset=UTF-8";
-    const QString CONTENT_TYPE_JS = "text/javascript; charset=UTF-8";
+    const QString CONTENT_TYPE_JS = "application/javascript; charset=UTF-8";
+    const QString CONTENT_TYPE_JSON = "application/json";
     const QString CONTENT_TYPE_PNG = "image/png";
     const QString CONTENT_TYPE_TXT = "text/plain; charset=UTF-8";
 
diff --git a/src/webui/webapplication.cpp b/src/webui/webapplication.cpp
index 89c553135..7a4dfe8f9 100644
--- a/src/webui/webapplication.cpp
+++ b/src/webui/webapplication.cpp
@@ -223,43 +223,43 @@ void WebApplication::action_query_torrents()
     print(btjson::getTorrents(
         gets["filter"], gets["label"], gets["sort"], gets["reverse"] == "true",
         gets["limit"].toInt(), gets["offset"].toInt()
-        ), Http::CONTENT_TYPE_JS);
+        ), Http::CONTENT_TYPE_JSON);
 }
 
 void WebApplication::action_query_preferences()
 {
     CHECK_URI(0);
-    print(prefjson::getPreferences(), Http::CONTENT_TYPE_JS);
+    print(prefjson::getPreferences(), Http::CONTENT_TYPE_JSON);
 }
 
 void WebApplication::action_query_transferInfo()
 {
     CHECK_URI(0);
-    print(btjson::getTransferInfo(), Http::CONTENT_TYPE_JS);
+    print(btjson::getTransferInfo(), Http::CONTENT_TYPE_JSON);
 }
 
 void WebApplication::action_query_propertiesGeneral()
 {
     CHECK_URI(1);
-    print(btjson::getPropertiesForTorrent(args_.front()), Http::CONTENT_TYPE_JS);
+    print(btjson::getPropertiesForTorrent(args_.front()), Http::CONTENT_TYPE_JSON);
 }
 
 void WebApplication::action_query_propertiesTrackers()
 {
     CHECK_URI(1);
-    print(btjson::getTrackersForTorrent(args_.front()), Http::CONTENT_TYPE_JS);
+    print(btjson::getTrackersForTorrent(args_.front()), Http::CONTENT_TYPE_JSON);
 }
 
 void WebApplication::action_query_propertiesWebSeeds()
 {
     CHECK_URI(1);
-    print(btjson::getWebSeedsForTorrent(args_.front()), Http::CONTENT_TYPE_JS);
+    print(btjson::getWebSeedsForTorrent(args_.front()), Http::CONTENT_TYPE_JSON);
 }
 
 void WebApplication::action_query_propertiesFiles()
 {
     CHECK_URI(1);
-    print(btjson::getFilesForTorrent(args_.front()), Http::CONTENT_TYPE_JS);
+    print(btjson::getFilesForTorrent(args_.front()), Http::CONTENT_TYPE_JSON);
 }
 
 // GET param:
@@ -267,7 +267,9 @@ void WebApplication::action_query_propertiesFiles()
 void WebApplication::action_sync_maindata()
 {
     CHECK_URI(0);
-    print(btjson::getSyncMainData(request().gets["rid"].toInt(), session()->syncMainDataLastResponse, session()->syncMainDataLastAcceptedResponse));
+    print(btjson::getSyncMainData(request().gets["rid"].toInt(),
+        session()->syncMainDataLastResponse,
+        session()->syncMainDataLastAcceptedResponse), Http::CONTENT_TYPE_JSON);
 }
 
 void WebApplication::action_version_api()
@@ -424,13 +426,13 @@ void WebApplication::action_command_setFilePrio()
 void WebApplication::action_command_getGlobalUpLimit()
 {
     CHECK_URI(0);
-    print(QByteArray::number(BitTorrent::Session::instance()->uploadRateLimit()));
+    print(QByteArray::number(BitTorrent::Session::instance()->uploadRateLimit()), Http::CONTENT_TYPE_TXT);
 }
 
 void WebApplication::action_command_getGlobalDlLimit()
 {
     CHECK_URI(0);
-    print(QByteArray::number(BitTorrent::Session::instance()->downloadRateLimit()));
+    print(QByteArray::number(BitTorrent::Session::instance()->downloadRateLimit()), Http::CONTENT_TYPE_TXT);
 }
 
 void WebApplication::action_command_setGlobalUpLimit()
@@ -466,7 +468,7 @@ void WebApplication::action_command_getTorrentsUpLimit()
     CHECK_URI(0);
     CHECK_PARAMETERS("hashes");
     QStringList hashes = request().posts["hashes"].split("|");
-    print(btjson::getTorrentsRatesLimits(hashes, false), Http::CONTENT_TYPE_JS);
+    print(btjson::getTorrentsRatesLimits(hashes, false), Http::CONTENT_TYPE_JSON);
 }
 
 void WebApplication::action_command_getTorrentsDlLimit()
@@ -474,7 +476,7 @@ void WebApplication::action_command_getTorrentsDlLimit()
     CHECK_URI(0);
     CHECK_PARAMETERS("hashes");
     QStringList hashes = request().posts["hashes"].split("|");
-    print(btjson::getTorrentsRatesLimits(hashes, true), Http::CONTENT_TYPE_JS);
+    print(btjson::getTorrentsRatesLimits(hashes, true), Http::CONTENT_TYPE_JSON);
 }
 
 void WebApplication::action_command_setTorrentsUpLimit()
@@ -520,7 +522,7 @@ void WebApplication::action_command_toggleAlternativeSpeedLimits()
 void WebApplication::action_command_alternativeSpeedLimitsEnabled()
 {
     CHECK_URI(0);
-    print(QByteArray::number(Preferences::instance()->isAltBandwidthEnabled()));
+    print(QByteArray::number(Preferences::instance()->isAltBandwidthEnabled()), Http::CONTENT_TYPE_TXT);
 }
 
 void WebApplication::action_command_toggleSequentialDownload()