diff --git a/README.md b/README.md
index 816a941..d39122a 100644
--- a/README.md
+++ b/README.md
@@ -20,13 +20,13 @@ To use it, include this crate along with prost:
 ```toml
 [dependencies]
 prost = "0.11"
-prost-wkt = "0.3"
-prost-wkt-types = "0.3"
+prost-wkt = "0.4"
+prost-wkt-types = "0.4"
 serde = { version = "1.0", features = ["derive"] }
 
 [build-dependencies]
 prost-build = "0.11"
-prost-wkt-build = "0.3"
+prost-wkt-build = "0.4"
 ```
 
 In your `build.rs`, make sure to add the following options:
@@ -300,4 +300,4 @@ Please see `wkt-types/README.md` for more info.
 
 See [LICENSE](LICENSE) for details.
 
-Copyright 2020 Ferdinand de Antoni
+Copyright 2023 Ferdinand de Antoni