diff --git a/Readme.md b/Readme.md
index 120a5c6..d99fe45 100644
--- a/Readme.md
+++ b/Readme.md
@@ -25,6 +25,11 @@ zhv : {
 }
 ```
 
+## Note Regarding Localstorage
+
+If you use local storage please prefix your variables with an unique prefix (your webapp name + random uuid should do it) to avoid collision with other web apps.
+Also don't use `clear()` as it clears everything for every webapp.
+
 ## Building ZHV
 Debug build:
 
diff --git a/app/build.gradle b/app/build.gradle
index 3deb6b4..170efa6 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -7,8 +7,8 @@ android {
         // don't go bellow 19, otherwise you may introduce web-view security risks
         minSdkVersion 19
         targetSdkVersion 28
-        versionCode 3
-        versionName "1.2"
+        versionCode 4
+        versionName "1.3"
     }
     signingConfigs {
 
diff --git a/app/src/main/java/de/simonlaux/ziphtmlviewer/OpenActivity.java b/app/src/main/java/de/simonlaux/ziphtmlviewer/OpenActivity.java
index dc7cebf..da727e2 100644
--- a/app/src/main/java/de/simonlaux/ziphtmlviewer/OpenActivity.java
+++ b/app/src/main/java/de/simonlaux/ziphtmlviewer/OpenActivity.java
@@ -72,6 +72,7 @@ private void handleIntent() {
         webSettings.setJavaScriptEnabled(true);
         webSettings.setSupportZoom(true);
         webSettings.setBuiltInZoomControls(true);
+        webSettings.setDomStorageEnabled(true);
         class JsObject {
             @JavascriptInterface
             public int getVersion() { return BuildConfig.VERSION_CODE; }