diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index 05d693f..c8fa2e1 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -1969,6 +1969,31 @@ void Human::CheckSkinTank()
 void Human::_UpdateMove(int speed)
 {
     #if 1
+    do {
+        int distance = std::min(5, speed);
+        _InternalUpdateMove(distance);
+        speed -= distance;
+    } while (speed > 0);
+    #else
+    for (int i = 0; i < speed; ++i) {
+        a8::Vec2 old_pos = GetPos();
+        SetPos(GetPos() + move_dir);
+        if (IsCollisionInMapService()) {
+            SetPos(old_pos);
+            FindPathInMapService();
+            #if 0
+            if (rand() % 3 == 0) {
+                i += 1;
+            }
+            #endif
+        }
+        room->grid_service.MoveHuman(this);
+    }
+    #endif
+}
+
+void Human::_InternalUpdateMove(float speed)
+{
     float nx = move_dir.x * speed;
     float ny = move_dir.y * speed;
     a8::Vec2 old_pos = GetPos();
@@ -2010,22 +2035,6 @@ void Human::_UpdateMove(int speed)
 
     SetPos(old_pos + a8::Vec2(nx, ny));
     room->grid_service.MoveHuman(this);
-    #else
-    for (int i = 0; i < speed; ++i) {
-        a8::Vec2 old_pos = GetPos();
-        SetPos(GetPos() + move_dir);
-        if (IsCollisionInMapService()) {
-            SetPos(old_pos);
-            FindPathInMapService();
-            #if 0
-            if (rand() % 3 == 0) {
-                i += 1;
-            }
-            #endif
-        }
-        room->grid_service.MoveHuman(this);
-    }
-    #endif
 }
 
 void Human::ClearFrameData()
diff --git a/server/gameserver/human.h b/server/gameserver/human.h
index c744f4f..bdc86c0 100644
--- a/server/gameserver/human.h
+++ b/server/gameserver/human.h
@@ -246,6 +246,7 @@ class Human : public Entity
 
 protected:
     void _UpdateMove(int speed);
+    void _InternalUpdateMove(float speed);
     void ProcLootOldSkin(Loot* entity, MetaData::Equip* item_meta);
     void ProcLootSkin(Loot* entity, MetaData::Equip* item_meta);
     void ProcLootCar(Loot* entity, MetaData::Equip* item_meta);
diff --git a/third_party/a8engine b/third_party/a8engine
index 62cad93..c6c7cb3 160000
--- a/third_party/a8engine
+++ b/third_party/a8engine
@@ -1 +1 @@
-Subproject commit 62cad93ca276670dc7280425df58916bacbe20e5
+Subproject commit c6c7cb379e997ce3808edff38e822eda3da19915