diff --git a/pyproject.toml b/pyproject.toml
index 97422a023..11b90aa93 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "lido-oracle"
-version = "4.0.0-rc.1"
+version = "4.0.1"
 description = "Oracle daemon for Lido decentralized staking service. Collects and reports Ethereum 2.0 beacon chain states (the number of visible validators and their summarized balances) to the Lido dApp contract running on Ethereum 1.0 side."
 authors = [
     "Dmitry Chernukhin",
diff --git a/src/modules/ejector/ejector.py b/src/modules/ejector/ejector.py
index 7fc0f9119..b7c3be5e6 100644
--- a/src/modules/ejector/ejector.py
+++ b/src/modules/ejector/ejector.py
@@ -306,10 +306,11 @@ def _get_churn_limit(self, blockstamp: ReferenceBlockStamp) -> int:
         return churn_limit
 
     def _get_total_active_validators(self, blockstamp: ReferenceBlockStamp) -> int:
-        total_active_validators = len([
-            is_active_validator(val, blockstamp.ref_epoch)
-            for val in self.w3.cc.get_validators(blockstamp)
-        ])
+        total_active_validators = reduce(
+            lambda total, validator: total + int(is_active_validator(validator, blockstamp.ref_epoch)),
+            self.w3.cc.get_validators(blockstamp),
+            0,
+        )
         logger.info({'msg': 'Calculate total active validators.', 'value': total_active_validators})
         return total_active_validators
 
diff --git a/tests/factory/no_registry.py b/tests/factory/no_registry.py
index 6e23eb701..eee95c6c5 100644
--- a/tests/factory/no_registry.py
+++ b/tests/factory/no_registry.py
@@ -53,6 +53,36 @@ def build_with_activation_epoch_bound(cls, max_value: int, **kwargs: Any):
             validator=ValidatorStateFactory.build(activation_epoch=str(faker.pyint(max_value=max_value - 1))), **kwargs
         )
 
+    @classmethod
+    def build_not_active_vals(cls, epoch, **kwargs: Any):
+        return cls.build(
+            validator=ValidatorStateFactory.build(
+                activation_epoch=str(faker.pyint(min_value=epoch + 1, max_value=FAR_FUTURE_EPOCH)),
+                exit_epoch=str(FAR_FUTURE_EPOCH),
+            ),
+            **kwargs
+        )
+
+    @classmethod
+    def build_active_vals(cls, epoch, **kwargs: Any):
+        return cls.build(
+            validator=ValidatorStateFactory.build(
+                activation_epoch=str(faker.pyint(min_value=0, max_value=epoch - 1)),
+                exit_epoch=str(faker.pyint(min_value=epoch + 1, max_value=FAR_FUTURE_EPOCH)),
+            ),
+            **kwargs
+        )
+
+    @classmethod
+    def build_exit_vals(cls, epoch, **kwargs: Any):
+        return cls.build(
+            validator=ValidatorStateFactory.build(
+                activation_epoch='0',
+                exit_epoch=str(faker.pyint(min_value=1, max_value=epoch)),
+            ),
+            **kwargs
+        )
+
 
 class NodeOperatorFactory(Web3Factory):
     __model__ = NodeOperator
diff --git a/tests/modules/ejector/test_ejector.py b/tests/modules/ejector/test_ejector.py
index 0b80ba7e9..988829cd9 100644
--- a/tests/modules/ejector/test_ejector.py
+++ b/tests/modules/ejector/test_ejector.py
@@ -234,6 +234,21 @@ def test_get_predicted_withdrawable_epoch(ejector: Ejector) -> None:
     assert result == 3809, "Unexpected predicted withdrawable epoch"
 
 
+@pytest.mark.unit
+def test_get_total_active_validators(ejector: Ejector) -> None:
+    ref_blockstamp = ReferenceBlockStampFactory.build(ref_epoch=3546)
+    ejector.w3 = Mock()
+    ejector.w3.cc.get_validators = Mock(
+        return_value=[
+            *[LidoValidatorFactory.build_not_active_vals(ref_blockstamp.ref_epoch) for _ in range(150)],
+            *[LidoValidatorFactory.build_active_vals(ref_blockstamp.ref_epoch) for _ in range(100)],
+            *[LidoValidatorFactory.build_exit_vals(ref_blockstamp.ref_epoch) for _ in range(50)],
+        ]
+    )
+
+    assert ejector._get_total_active_validators(ref_blockstamp) == 100
+
+
 @pytest.mark.unit
 @pytest.mark.usefixtures("consensus_client", "lido_validators")
 def test_get_withdrawable_lido_validators(