diff --git a/readme.md b/readme.md
index b4958e0..76f167d 100644
--- a/readme.md
+++ b/readme.md
@@ -430,7 +430,7 @@ Returns `true` if `value` is an odd integer.
 
 ##### .propertyKey(value)
 
-Returns `true` if `value` can be used as an object property key (either `string`, `number`, or `symbol`.)
+Returns `true` if `value` can be used as an object property key (either `string`, `number`, or `symbol`).
 
 ##### .any(predicate | predicate[], ...values)