diff --git a/Cargo.toml b/Cargo.toml
index 3b9f6a1..fd84a4e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,7 @@ license = "Apache-2.0 OR MIT"
 repository = "https://github.com/taiki-e/pin-project-lite"
 keywords = ["pin", "macros"]
 categories = ["no-std", "rust-patterns"]
-exclude = ["/.*", "/tools"]
+exclude = ["/.*", "/tools", "/DEVELOPMENT.md"]
 description = """
 A lightweight version of pin-project written with declarative macros.
 """