diff --git a/src/entity/AbstractEntityRepositoryDb.php b/src/entity/AbstractEntityRepositoryDb.php
index 87e7503..74ce861 100644
--- a/src/entity/AbstractEntityRepositoryDb.php
+++ b/src/entity/AbstractEntityRepositoryDb.php
@@ -95,10 +95,10 @@ public function findAll(Condition $condition = null): array
     }
 
     /**
-     * @param Condition $condition
+     * @param Condition|null $condition
      * @return int
      */
-    public function count(Condition $condition): int
+    public function count(Condition $condition = null): int
     {
         $select = $this->selectQuery($condition);
         return $select->select(['t1.id'])->execute()->rowCount();
diff --git a/src/entity/AbstractEntityService.php b/src/entity/AbstractEntityService.php
index 086975a..6f4c85c 100644
--- a/src/entity/AbstractEntityService.php
+++ b/src/entity/AbstractEntityService.php
@@ -71,10 +71,10 @@ public function findAll(Condition $condition = null): array
 
     /**
      * Proxy method
-     * @param Condition $condition
+     * @param Condition|null $condition
      * @return int
      */
-    public function count(Condition $condition): int
+    public function count(Condition $condition = null): int
     {
         return $this->repository->count($condition);
     }
diff --git a/src/entity/EntityRepositoryInterface.php b/src/entity/EntityRepositoryInterface.php
index 045f1e9..cd8cf34 100644
--- a/src/entity/EntityRepositoryInterface.php
+++ b/src/entity/EntityRepositoryInterface.php
@@ -37,10 +37,10 @@ public function findOne(Condition $condition);
     public function findAll(Condition $condition = null): array;
 
     /**
-     * @param Condition $condition
+     * @param Condition|null $condition
      * @return int
      */
-    public function count(Condition $condition): int;
+    public function count(Condition $condition = null): int;
 
     /**
      * @param AbstractEntity $item