diff --git a/README.md b/README.md
index a364c0e32fec0e16f184db197ee5bdd235e0afde..9891acab14113718faa3e3a2837d27abf3c96532 100644
--- a/README.md
+++ b/README.md
@@ -45,8 +45,8 @@ The code of `set-local-abbrevs` comes from
 
 And we define the following abbreviations,
 
-|----------|---|
-| subtype  | ⊑ |
-| upcast   | ↑ |
-| downcast | ↓ |
-|----------|---|
+| Key sequence | Expansion |
+|:-------------|----------:|
+| subtype      |         ⊑ |
+| upcast       |         ↑ |
+| downcast     |         ↓ |