diff --git a/Cargo.toml b/Cargo.toml
index 4d686f0..ded843c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "syn"
-version = "0.4.0"
+version = "0.4.0" # don't forget to update version in readme
 authors = ["David Tolnay <dtolnay@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "Nom parser for Rust items"
diff --git a/README.md b/README.md
index c6831c7..5af6217 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 
 ```toml
 [dependencies]
-syn = "0.3"
+syn = "0.4"
 ```
 
 ```rust