diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 9948868..2115831 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -24,6 +24,15 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.my.provider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/provider_paths"/>
+        </provider>
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/de/sebse/fuplanner/services/KVV/Download.java b/app/src/main/java/de/sebse/fuplanner/services/KVV/Download.java
index 8fcfb83..dab0fd3 100644
--- a/app/src/main/java/de/sebse/fuplanner/services/KVV/Download.java
+++ b/app/src/main/java/de/sebse/fuplanner/services/KVV/Download.java
@@ -15,6 +15,7 @@ import java.util.Arrays;
 
 import androidx.annotation.Nullable;
 import androidx.core.app.ActivityCompat;
+import androidx.core.content.FileProvider;
 import de.sebse.fuplanner.MainActivity;
 import de.sebse.fuplanner.R;
 import de.sebse.fuplanner.services.KVV.types.Resource;
@@ -55,7 +56,7 @@ public class Download {
         if (file.getModifiedDate() != 0) {
             if (!message.isEmpty())
                 message += "\n";
-            resources.getString(R.string.last_modified_on, UtilsDate.getModifiedDateTime(contextInterface.get(), file.getModifiedDate()));
+            message += resources.getString(R.string.last_modified_on, UtilsDate.getModifiedDateTime(contextInterface.get(), file.getModifiedDate()));
         }
 
         alertDialogBuilder
@@ -181,9 +182,17 @@ public class Download {
     }
 
     private void fileOpen(File url){
-        Uri uri = Uri.fromFile(url);
 
-        Intent intent = new Intent();//Intent.ACTION_VIEW
+        Uri uri = FileProvider.getUriForFile(contextInterface.get(), contextInterface.get().getApplicationContext().getPackageName() + ".my.provider", url);
+
+        Intent intent;
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
+            intent = new Intent(Intent.ACTION_VIEW);
+        } else {
+            intent = new Intent();
+        }
+        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+        intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
         // Check what kind of file you are trying to open, by comparing the url with extensions.
         // When the if condition is matched, plugin sets the correct intent (mime) type,
         // so Android knew what application to use to open the file
@@ -228,7 +237,6 @@ public class Download {
             //so you can choose which application to use
             intent.setDataAndType(uri, "*/*");
         }
-
         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         contextInterface.get().startActivity(intent);
 
diff --git a/app/src/main/res/xml/provider_paths.xml b/app/src/main/res/xml/provider_paths.xml
new file mode 100644
index 0000000..4495c28
--- /dev/null
+++ b/app/src/main/res/xml/provider_paths.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <external-path name="external_files" path="."/>
+</paths>
\ No newline at end of file