diff --git a/README.md b/README.md
index 2e68213..de4a5cd 100644
--- a/README.md
+++ b/README.md
@@ -91,7 +91,7 @@ Tada!
 
 ### Persistent history
 
-By default, the last 100 command sequences is stored in `~/.machi_history`.
+By default, the last 100 command sequences are stored in `~/.machi_history`.
 To change that, please refer to `editor.lua`. (XXX more documents)
 
 ## Other functions