diff --git a/README.md b/README.md
index fa72fb5..b6ba8b2 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ Similarly if there is a `format` field set to `uuid`:
 ```
 
 Note that the macro will be re-evaluated when the OpenAPI json document
-changes (when it's mtime is updated).
+changes (when its mtime is updated).
 
 ### Builder
 
@@ -139,4 +139,4 @@ uuid = { version = "0.8", features = ["serde", "v4"] }
 ```
 
 Note that there is a dependency on `percent-encoding` which macro- and
-build.rs-generated clients is included from `progenitor-client`.
\ No newline at end of file
+build.rs-generated clients is included from `progenitor-client`.