diff --git a/src/mhw_armor_edit/ftypes/skl_dat.py b/src/mhw_armor_edit/ftypes/skl_dat.py
index c1face3..716f9f2 100644
--- a/src/mhw_armor_edit/ftypes/skl_dat.py
+++ b/src/mhw_armor_edit/ftypes/skl_dat.py
@@ -4,13 +4,17 @@
 
 
 class SklDatEntry(Struct):
-    STRUCT_SIZE = 11
+    STRUCT_SIZE = 19
     skill_id: ft.ushort()
     level: ft.ubyte()
     param1: ft.ushort()
     param2: ft.ushort()
     param3: ft.ushort()
     param4: ft.ushort()
+    param5: ft.ushort()
+    param6: ft.ushort()
+    param7: ft.ushort()
+    param8: ft.ushort()
 
 
 class SklDat(StructFile):