diff --git a/tgmsbot.py b/tgmsbot.py
index 90c03c8..bfb4281 100644
--- a/tgmsbot.py
+++ b/tgmsbot.py
@@ -40,7 +40,7 @@ HEIGHT = 8
 WIDTH = 8
 MINES = 9
 
-UNOPENED_CELL = "\u2588"
+UNOPENED_CELL = "\u25a0"
 FLAGGED_CELL = "\U0001f6a9"
 STEPPED_CELL = "\u2622"
 NUM_CELL_0 = "\u2800"