diff --git a/python/tests/test_params.py b/python/tests/test_params.py
index b067a25..0a85a7a 100644
--- a/python/tests/test_params.py
+++ b/python/tests/test_params.py
@@ -82,7 +82,7 @@ class TestHnswIndexParam:
     def test_default(self):
         param = HnswIndexParam()
         assert param.metric_type == MetricType.IP
-        assert param.m == 100
+        assert param.m == 50
         assert param.ef_construction == 500
         assert param.quantize_type == QuantizeType.UNDEFINED
         assert param.type == IndexType.HNSW
diff --git a/python/tests/test_schema.py b/python/tests/test_schema.py
index f828d73..4a4e1a5 100644
--- a/python/tests/test_schema.py
+++ b/python/tests/test_schema.py
@@ -165,7 +165,7 @@ def test_collection_schema_with_single_field(self):
         assert vector.data_type == DataType.VECTOR_INT8
         assert vector.dimension == 128
         assert vector.index_param.type == IndexType.HNSW
-        assert vector.index_param.m == 100
+        assert vector.index_param.m == 50
         assert vector.index_param.ef_construction == 500
         assert vector.index_param.metric_type == MetricType.IP
 
diff --git a/python/zvec/model/param/__init__.pyi b/python/zvec/model/param/__init__.pyi
index a1a9dcc..ea2f34e 100644
--- a/python/zvec/model/param/__init__.pyi
+++ b/python/zvec/model/param/__init__.pyi
@@ -189,7 +189,7 @@ class HnswIndexParam(VectorIndexParam):
             Default is ``MetricType.IP`` (inner product).
         m (int): Number of bi-directional links created for every new element
             during construction. Higher values improve accuracy but increase
-            memory usage and construction time. Default is 100.
+            memory usage and construction time. Default is 50.
         ef_construction (int): Size of the dynamic candidate list for nearest
             neighbors during index construction. Larger values yield better
             graph quality at the cost of slower build time. Default is 500.
@@ -272,7 +272,7 @@ class HnswQueryParam(QueryParam):
 
         Args:
             ef (int, optional): Search-time candidate list size.
-                Higher values improve accuracy. Defaults to 100.
+                Higher values improve accuracy. Defaults to 300.
             radius (float, optional): Search radius for range queries. Default is 0.0.
             is_linear (bool, optional): Force linear search. Default is False.
             is_using_refiner (bool, optional): Whether to use refiner for the query. Default is False.
diff --git a/src/core/interface/constants.h b/src/core/interface/constants.h
index aeb941a..4efcdfa 100644
--- a/src/core/interface/constants.h
+++ b/src/core/interface/constants.h
@@ -5,7 +5,7 @@
 namespace zvec::core_interface {
 
 constexpr static uint32_t kDefaultHnswEfConstruction = 500;
-constexpr static uint32_t kDefaultHnswNeighborCnt = 100;
+constexpr static uint32_t kDefaultHnswNeighborCnt = 50;
 
 constexpr static uint32_t kDefaultHnswEfSearch = 300;