diff --git a/src/application/model/block.php b/src/application/model/block.php
index 3e5234c..02ee851 100644
--- a/src/application/model/block.php
+++ b/src/application/model/block.php
@@ -17,7 +17,7 @@ class ModelBlock extends Model {
     }
   }
 
-  public function addBlock(int $hash, int $time) {
+  public function addBlock(string $hash, int $time) {
 
     try {
 
diff --git a/src/application/model/user.php b/src/application/model/user.php
index ab4f3b0..f9da70f 100644
--- a/src/application/model/user.php
+++ b/src/application/model/user.php
@@ -19,7 +19,7 @@ class ModelUser extends Model {
     }
   }
 
-  public function addUser(int $blockId, int $userName) {
+  public function addUser(int $blockId, string $userName) {
 
     try {