diff --git a/framework/src/org/apache/cordova/ConfigXmlParser.java b/framework/src/org/apache/cordova/ConfigXmlParser.java
index e9365173..69d02ee6 100644
--- a/framework/src/org/apache/cordova/ConfigXmlParser.java
+++ b/framework/src/org/apache/cordova/ConfigXmlParser.java
@@ -154,7 +154,7 @@ public class ConfigXmlParser {
             return "file:///android_asset/www/";
         } else {
             String scheme = prefs.getString("scheme", SCHEME_HTTPS).toLowerCase();
-            String hostname = prefs.getString("hostname", DEFAULT_HOSTNAME);
+            String hostname = prefs.getString("hostname", DEFAULT_HOSTNAME).toLowerCase();
 
             if (!scheme.contentEquals(SCHEME_HTTP) && !scheme.contentEquals(SCHEME_HTTPS)) {
                 LOG.d(TAG, "The provided scheme \"" + scheme + "\" is not valid. " +
diff --git a/framework/src/org/apache/cordova/PluginManager.java b/framework/src/org/apache/cordova/PluginManager.java
index 472bd2b5..05029937 100755
--- a/framework/src/org/apache/cordova/PluginManager.java
+++ b/framework/src/org/apache/cordova/PluginManager.java
@@ -383,7 +383,7 @@ public class PluginManager {
     private String getLaunchUrlPrefix() {
         if (!app.getPreferences().getBoolean("AndroidInsecureFileModeEnabled", false)) {
             String scheme = app.getPreferences().getString("scheme", SCHEME_HTTPS).toLowerCase();
-            String hostname = app.getPreferences().getString("hostname", DEFAULT_HOSTNAME);
+            String hostname = app.getPreferences().getString("hostname", DEFAULT_HOSTNAME).toLowerCase();
             return scheme + "://" + hostname + '/';
         }
 
diff --git a/framework/src/org/apache/cordova/engine/SystemWebViewClient.java b/framework/src/org/apache/cordova/engine/SystemWebViewClient.java
index 2fea4feb..05400417 100755
--- a/framework/src/org/apache/cordova/engine/SystemWebViewClient.java
+++ b/framework/src/org/apache/cordova/engine/SystemWebViewClient.java
@@ -71,7 +71,7 @@ public class SystemWebViewClient extends WebViewClient {
         this.parentEngine = parentEngine;
 
         WebViewAssetLoader.Builder assetLoaderBuilder = new WebViewAssetLoader.Builder()
-                .setDomain(parentEngine.preferences.getString("hostname", "localhost"))
+                .setDomain(parentEngine.preferences.getString("hostname", "localhost").toLowerCase())
                 .setHttpAllowed(true);
 
         assetLoaderBuilder.addPathHandler("/", path -> {