diff --git a/README.md b/README.md
index cbc8c10..c69d632 100644
--- a/README.md
+++ b/README.md
@@ -145,7 +145,7 @@ On iOS, tvOS we can also specify `protectionType` on `DiskConfig` to add a level
 
 ### Sync APIs
 
-`Storage` is sync by default and is `thead safe`, you can access it from any queues. All Sync functions are constrained by `StorageAware` protocol.
+`Storage` is sync by default and is `thread safe`, you can access it from any queues. All Sync functions are constrained by `StorageAware` protocol.
 
 ```swift
 // Save to storage