diff --git a/config.xml b/config.xml
index a8c1baeca..8a7aca1cc 100644
--- a/config.xml
+++ b/config.xml
@@ -84,42 +84,39 @@
         <splash height="960" src="resources/ios/splash/Default@2x~iphone.png" width="640" />
         <splash height="480" src="resources/ios/splash/Default~iphone.png" width="320" />
     </platform>
-    <engine name="android" spec="~6.1.2" />
-    <engine name="ios" spec="~4.3.1" />
-    <plugin name="cordova-plugin-device" spec="~1.1.6" />
-    <plugin name="cordova-plugin-globalization" spec="~1.0.7" />
-    <plugin name="cordova-plugin-file" spec="~4.3.3" />
-    <plugin name="cordova-plugin-file-transfer" spec="~1.6.3" />
-    <plugin name="cordova-plugin-inappbrowser" spec="~1.7.1" />
-    <plugin name="cordova-plugin-network-information" spec="~1.3.3" />
-    <plugin name="cordova-plugin-camera" spec="~2.4.1">
+    <engine name="android" spec="6.1.2" />
+    <engine name="ios" spec="4.3.1" />
+    <plugin name="cordova-plugin-file" spec="4.3.3" />
+    <plugin name="cordova-plugin-file-transfer" spec="1.6.3" />
+    <plugin name="cordova-plugin-camera" spec="2.4.1">
         <variable name="CAMERA_USAGE_DESCRIPTION" value="We'd like to access your camera to let you take a photo" />
         <variable name="PHOTOLIBRARY_USAGE_DESCRIPTION" value="We'd like like to open your photo library to let you pick a photo" />
     </plugin>
-    <plugin name="cordova-plugin-media-capture" spec="~1.4.3">
+    <plugin name="cordova-plugin-media-capture" spec="1.4.3">
         <variable name="CAMERA_USAGE_DESCRIPTION" value="We'd like to access your camera to let you take a photo" />
         <variable name="PHOTOLIBRARY_USAGE_DESCRIPTION" value="We'd like like to open your photo library to let you pick a photo" />
         <variable name="MICROPHONE_USAGE_DESCRIPTION" value="We'd like to access your microphone to let you record an audio" />
     </plugin>
-    <plugin name="cordova-plugin-splashscreen" spec="~4.0.3" />
-    <plugin name="cordova-plugin-statusbar" spec="~2.2.3" />
-    <plugin name="cordova-plugin-whitelist" spec="~1.3.2" />
-    <plugin name="ionic-plugin-keyboard" spec="~2.2.1" />
-    <plugin name="cordova-plugin-local-notifications-mm" spec="~1.0.6" />
-    <plugin name="cordova-plugin-zip" spec="~3.1.0" />
-    <plugin name="cordova-plugin-customurlscheme" spec="~4.3.0">
-        <variable name="URL_SCHEME" value="moodlemobile" />
-        <variable name="ANDROID_SCHEME" value=" " />
-        <variable name="ANDROID_HOST" value=" " />
-        <variable name="ANDROID_PATHPREFIX" value="/" />
-    </plugin>
-    <plugin name="phonegap-plugin-push" spec="~1.10.5">
+    <plugin name="cordova-plugin-device" spec="1.1.6" />
+    <plugin name="cordova-plugin-globalization" spec="1.0.7" />
+    <plugin name="cordova-plugin-inappbrowser" spec="1.7.1" />
+    <plugin name="cordova-plugin-network-information" spec="1.3.3" />
+    <plugin name="cordova-plugin-statusbar" spec="2.2.3" />
+    <plugin name="cordova-plugin-whitelist" spec="1.3.2" />
+    <plugin name="cordova-plugin-splashscreen" spec="4.0.3" />
+    <plugin name="cordova-clipboard" spec="1.1.0" />
+    <plugin name="nl.kingsquare.cordova.background-audio" spec="1.0.1" />
+    <plugin name="phonegap-plugin-push" spec="1.9.2">
         <variable name="SENDER_ID" value="694767596569" />
     </plugin>
-    <plugin name="nl.kingsquare.cordova.background-audio" spec="~1.0.1" />
-    <plugin name="ch.ti8m.documenthandler" spec="https://github.com/ti8m/DocumentHandler" />
-    <plugin name="net.tunts.webintent" spec="https://github.com/Tunts/WebIntent" />
-    <plugin name="cordova-sqlite-storage" spec="~2.0.4" />
-    <plugin name="cordova-plugin-ionic-webview" spec="~1.1.16" />
-    <plugin name="cordova-clipboard" spec="~1.1.0" />
+    <plugin name="cordova-plugin-customurlscheme" spec="4.3.0">
+        <variable name="URL_SCHEME" value="moodlemobile" />
+    </plugin>
+    <plugin name="ionic-plugin-keyboard" spec="2.2.1" />
+    <plugin name="cordova-plugin-zip" spec="3.1.0" />
+    <plugin name="cordova-plugin-local-notifications-mm" />
+    <plugin name="net.tunts.webintent" spec="https://github.com/Tunts/WebIntent.git" />
+    <plugin name="ch.ti8m.documenthandler" spec="https://github.com/ti8m/DocumentHandler.git" />
+    <plugin name="cordova-sqlite-storage" spec="2.0.4" />
+    <plugin name="cordova-plugin-ionic-webview" spec="1.1.16" />
 </widget>