diff --git a/2020/README.md b/2020/README.md
index 43c5606..157bc03 100644
--- a/2020/README.md
+++ b/2020/README.md
@@ -13,7 +13,7 @@ asdf install
 ## Table of Contents
 
 | S   | M   | T   | W   | T   | F   | S   |
-| --- | --- | --- | --- | --- | --- | --- |
+| :-: | :-: | :-: | :-: | :-: | :-: | :-: |
 |     |     | [1] | 2   | 3   | 4   | 5   |
 | 6   | 7   | 8   | 9   | 10  | 11  | 12  |
 | 13  | 14  | 15  | 16  | 17  | 18  | 19  |