diff --git a/tetromino.py b/tetromino.py
index 924c780..9d4f0c9 100644
--- a/tetromino.py
+++ b/tetromino.py
@@ -176,7 +176,7 @@ class Tetromino():
             'o': {0: 9, 1: 9, 2: 9, 3: 9},
             'd': {0: 9, 1: 9, 2: 9, 3: 9},
             't': {0: 9, 1: 9, 2: 9, 3: 9},
-            's': {0: 9, 1: 8, 2: 9, 3: 8},
+            's': {0: 10, 1: 8, 2: 10, 3: 8},
             'z': {0: 10, 1: 8, 2: 10, 3: 8},
             'j': {0: 10, 1: 9, 2: 10, 3: 9},
             'l': {0: 8, 1: 9, 2: 8, 3: 9}