diff --git a/base_exception/models/base_exception.py b/base_exception/models/base_exception.py
index 8c1b706fa..7f6ea10b1 100644
--- a/base_exception/models/base_exception.py
+++ b/base_exception/models/base_exception.py
@@ -227,10 +227,10 @@ class BaseException(models.AbstractModel):
             model_exceptions, sub_exceptions, optimize)
 
         all_exception_ids = []
-        for obj, exception_ids in exception_by_rec.iteritems():
+        for obj, exception_ids in exception_by_rec.items():
             obj.exception_ids = [(6, 0, exception_ids)]
             all_exception_ids += exception_ids
-        for rule, exception_ids in exception_by_rule.iteritems():
+        for rule, exception_ids in exception_by_rule.items():
             rule[reverse_field] = [(6, 0, exception_ids.ids)]
             if exception_ids:
                 all_exception_ids += [rule.id]