diff --git a/internal/core/thirdparty/knowhere/CMakeLists.txt b/internal/core/thirdparty/knowhere/CMakeLists.txt
index 141f2c9d49..74c97e9341 100644
--- a/internal/core/thirdparty/knowhere/CMakeLists.txt
+++ b/internal/core/thirdparty/knowhere/CMakeLists.txt
@@ -11,7 +11,7 @@
 # or implied. See the License for the specific language governing permissions and limitations under the License.
 #-------------------------------------------------------------------------------
 
-set( KNOWHERE_VERSION 4176a66 )
+set( KNOWHERE_VERSION 3d21950 )
 
 message(STATUS "Building knowhere-${KNOWHERE_SOURCE_VER} from source")
 message(STATUS ${CMAKE_BUILD_TYPE})