diff --git a/app/src/main/java/com/sjapps/jsonlist/FileSystem.java b/app/src/main/java/com/sjapps/jsonlist/FileSystem.java
index dc6af44..5575122 100644
--- a/app/src/main/java/com/sjapps/jsonlist/FileSystem.java
+++ b/app/src/main/java/com/sjapps/jsonlist/FileSystem.java
@@ -6,6 +6,7 @@
 import com.google.gson.JsonObject;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.nio.file.Path;
 import java.util.Scanner;
 public class FileSystem {
 
@@ -19,6 +20,15 @@ public static JsonArray loadDataToJsonArray(JsonElement data) {
 
     public static String LoadDataFromFile(MainActivity mainActivity, Uri uri) {
 
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+            String path = uri.getPath();
+            if (path.contains("../"))
+                throw new SecurityException();
+            Path normalized = java.nio.file.FileSystems.getDefault().getPath(path).normalize();
+            if (normalized.startsWith("/data"))
+                throw new SecurityException();
+        }
+
         StringBuilder sb = new StringBuilder();
         FileInputStream inputStream = null;
         Scanner sc = null;