diff --git a/CHANGELOG.md b/CHANGELOG.md
index a3284270..1687d03d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+### v0.13.0-alpha.4 (2019-10-01)
+
+
+#### Bug Fixes
+
+* **body:** allow `http_body::Body` to be object-safe
+
+
 ### v0.13.0-alpha.3 (2019-10-01)
 
 
diff --git a/Cargo.toml b/Cargo.toml
index e378ad20..8e082524 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hyper"
-version = "0.13.0-alpha.3" # don't forget to update html_root_url
+version = "0.13.0-alpha.4" # don't forget to update html_root_url
 description = "A fast and correct HTTP library."
 readme = "README.md"
 homepage = "https://hyper.rs"
diff --git a/src/lib.rs b/src/lib.rs
index 5cad5ce3..e0098a2f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![doc(html_root_url = "https://docs.rs/hyper/0.13.0-alpha.3")]
+#![doc(html_root_url = "https://docs.rs/hyper/0.13.0-alpha.4")]
 #![deny(missing_docs)]
 #![deny(missing_debug_implementations)]
 #![cfg_attr(test, deny(rust_2018_idioms))]