diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index a31a55c..ba3de72 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,7 +1,7 @@
 ---
 repos:
   - repo: https://github.com/psf/black
-    rev: 23.7.0
+    rev: 23.9.1
     hooks:
       - id: black
         args:
@@ -20,4 +20,4 @@ repos:
     rev: v3.10.1
     hooks:
     -   id: pyupgrade
-        args: [--py37-plus]
\ No newline at end of file
+        args: [--py37-plus]
diff --git a/django_jalali/db/models.py b/django_jalali/db/models.py
index cf457a7..d93dac9 100644
--- a/django_jalali/db/models.py
+++ b/django_jalali/db/models.py
@@ -176,7 +176,7 @@ def get_prep_lookup(self, lookup_type, value):
 
         if lookup_type in ("exact", "gt", "gte", "lt", "lte"):
             prep = self.get_prep_value(value)
-            if type(prep) == datetime.datetime or type(prep) == datetime.date:
+            if isinstance(prep, (datetime.datetime, datetime.date)):
                 return prep
             return prep.togregorian()
 
@@ -435,7 +435,7 @@ def get_prep_lookup(self, lookup_type, value):
 
         if lookup_type in ("exact", "gt", "gte", "lt", "lte"):
             prep = self.get_prep_value(value)
-            if type(prep) == datetime.datetime or type(prep) == datetime.date:
+            if isinstance(prep, (datetime.datetime, datetime.date)):
                 return prep
             return prep.togregorian()