diff --git a/api/conftest.py b/api/conftest.py
index ab0581197bb81..94c6668ce9e45 100644
--- a/api/conftest.py
+++ b/api/conftest.py
@@ -580,7 +580,7 @@ def flagsmith_environments_v2_table(dynamodb) -> Table:
             },
         ],
         AttributeDefinitions=[
-            {"AttributeName": "environment_id", "AttributeType": "N"},
+            {"AttributeName": "environment_id", "AttributeType": "S"},
             {"AttributeName": "document_key", "AttributeType": "S"},
         ],
         BillingMode="PAY_PER_REQUEST",
diff --git a/api/environments/dynamodb/dynamodb_wrapper.py b/api/environments/dynamodb/dynamodb_wrapper.py
index b7e34b48f760b..0158c775128d9 100644
--- a/api/environments/dynamodb/dynamodb_wrapper.py
+++ b/api/environments/dynamodb/dynamodb_wrapper.py
@@ -190,7 +190,7 @@ def get_identity_overrides_by_feature_id(
         try:
             response = self._table.query(
                 KeyConditionExpression=Key(ENVIRONMENTS_V2_PARTITION_KEY).eq(
-                    environment_id,
+                    str(environment_id),
                 )
                 & Key(ENVIRONMENTS_V2_SORT_KEY).begins_with(
                     get_environments_v2_identity_override_document_key(
diff --git a/api/environments/dynamodb/types.py b/api/environments/dynamodb/types.py
index de11ddc77ae59..d43d124e88e14 100644
--- a/api/environments/dynamodb/types.py
+++ b/api/environments/dynamodb/types.py
@@ -74,7 +74,7 @@ def _save(self):
 
 
 class IdentityOverrideV2(BaseModel):
-    environment_id: int
+    environment_id: str
     document_key: str
     environment_api_key: str
     feature_state: FeatureStateModel
diff --git a/api/tests/unit/environments/dynamodb/test_unit_dynamodb_environment_v2_wrapper.py b/api/tests/unit/environments/dynamodb/test_unit_dynamodb_environment_v2_wrapper.py
index 6d882dd12253d..01825897ebfaa 100644
--- a/api/tests/unit/environments/dynamodb/test_unit_dynamodb_environment_v2_wrapper.py
+++ b/api/tests/unit/environments/dynamodb/test_unit_dynamodb_environment_v2_wrapper.py
@@ -30,7 +30,7 @@ def test_environment_v2_wrapper__get_identity_overrides__return_expected(
     identity_uuid = str(uuid.uuid4())
     identifier = "identity1"
     override_document = {
-        "environment_id": environment.id,
+        "environment_id": str(environment.id),
         "document_key": f"identity_override:{feature.id}:{identity_uuid}",
         "environment_api_key": environment.api_key,
         "identifier": identifier,
@@ -67,7 +67,7 @@ def test_environment_v2_wrapper__update_identity_overrides__put_expected(
     identity_uuid = str(uuid.uuid4())
     override_document = IdentityOverrideV2.parse_obj(
         {
-            "environment_id": environment.id,
+            "environment_id": str(environment.id),
             "document_key": f"identity_override:{feature.id}:{identity_uuid}",
             "environment_api_key": environment.api_key,
             "feature_state": map_feature_state_to_engine(feature_state),
@@ -105,7 +105,7 @@ def test_environment_v2_wrapper__update_identity_overrides__delete_expected(
     override_document_data = map_identity_override_to_identity_override_document(
         IdentityOverrideV2.parse_obj(
             {
-                "environment_id": environment.id,
+                "environment_id": str(environment.id),
                 "document_key": f"identity_override:{feature.id}:{identity_uuid}",
                 "environment_api_key": environment.api_key,
                 "feature_state": map_feature_state_to_engine(feature_state),
diff --git a/api/util/mappers/dynamodb.py b/api/util/mappers/dynamodb.py
index 5bbb5b09edbeb..2b39e0525e20d 100644
--- a/api/util/mappers/dynamodb.py
+++ b/api/util/mappers/dynamodb.py
@@ -55,7 +55,7 @@ def map_environment_to_environment_v2_document(
     return {
         **map_environment_to_environment_document(environment),
         "document_key": "META",
-        "environment_id": _decimal_encoder(environment.id),
+        "environment_id": str(environment.id),
     }