diff --git a/doc/release_notes/0_5_1.md b/doc/release_notes/0_5_1.md
new file mode 100644
index 00000000..6333a6e3
--- /dev/null
+++ b/doc/release_notes/0_5_1.md
@@ -0,0 +1,14 @@
+# 0.5.1
+
+## Improvements
+
+* Fixed flakiness of test suite introduced in the 0.4 versions;
+* compression plugin:
+  * do not send `accept-encoding` header when `range` is present;
+  * Remove from `content-encoding` if body stream decodes it;
+  * Added `HTTP::Response::Body#encodings` to return the decoded encoding(s);
+
+## Bugfixes
+
+* non-UTF-8 bodies weren't being properly handled, which led to a loop report (`slice` -> `byteslice`);
+* connection reuse now also happens for requests with body (it was only working with `GET`s and other bodyless requests before);
\ No newline at end of file
diff --git a/lib/httpx/version.rb b/lib/httpx/version.rb
index 9e2c2c45..d6731aa2 100644
--- a/lib/httpx/version.rb
+++ b/lib/httpx/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module HTTPX
-  VERSION = "0.5.0"
+  VERSION = "0.5.1"
 end
diff --git a/www/_data/versions.yml b/www/_data/versions.yml
index f7dd08b4..b5d0caa5 100644
--- a/www/_data/versions.yml
+++ b/www/_data/versions.yml
@@ -1,4 +1,7 @@
 -
+  -
+    name: "0.5.1"
+    path: "0_5_1_md.html"
   -
     name: "0.5.0"
     path: "0_5_0_md.html"