diff --git a/Cargo.lock b/Cargo.lock
index 640e0844d..08f1e7b1e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -49,7 +49,7 @@ dependencies = [
 
 [[package]]
 name = "actix-http"
-version = "3.12.0"
+version = "3.12.1"
 dependencies = [
  "actix-codec",
  "actix-http-test",
diff --git a/actix-http/CHANGES.md b/actix-http/CHANGES.md
index 115774f6a..c0ff503fd 100644
--- a/actix-http/CHANGES.md
+++ b/actix-http/CHANGES.md
@@ -2,7 +2,11 @@
 
 ## Unreleased
 
-- Reject HTTP/1 requests with ambiguous request framing from `Content-Length` and `Transfer-Encoding` headers to prevent request smuggling.
+## 3.12.1
+
+**Notice: This release contains a security fix. Users are encouraged to update to this version ASAP.**
+
+- SECURITY: Reject HTTP/1 requests with ambiguous request framing from `Content-Length` and `Transfer-Encoding` headers to prevent request smuggling.
 - Encode the HTTP/1 `Connection: Upgrade` header in Camel-Case when camel-case header formatting is enabled.[#3953]
 - Fix `HeaderMap` iterators' `len()` and `size_hint()` implementations for multi-value headers.
 - Update `rand` dependency to `0.10`.
diff --git a/actix-http/Cargo.toml b/actix-http/Cargo.toml
index a617459b8..07a4090c9 100644
--- a/actix-http/Cargo.toml
+++ b/actix-http/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "actix-http"
-version = "3.12.0"
+version = "3.12.1"
 authors = ["Nikolay Kim <fafhrd91@gmail.com>", "Rob Ede <robjtede@icloud.com>"]
 description = "HTTP types and services for the Actix ecosystem"
 keywords = ["actix", "http", "framework", "async", "futures"]
diff --git a/actix-web/Cargo.toml b/actix-web/Cargo.toml
index bb24ab175..e1cae53e3 100644
--- a/actix-web/Cargo.toml
+++ b/actix-web/Cargo.toml
@@ -137,7 +137,7 @@ actix-service = "2"
 actix-tls = { version = "3.4", default-features = false, optional = true }
 actix-utils = "3"
 
-actix-http = "3.12.0"
+actix-http = "3.12.1"
 actix-router = { version = "0.5.4", default-features = false, features = ["http"] }
 actix-web-codegen = { version = "4.3", optional = true, default-features = false }
 
diff --git a/awc/Cargo.toml b/awc/Cargo.toml
index 86b319e42..3fb11b584 100644
--- a/awc/Cargo.toml
+++ b/awc/Cargo.toml
@@ -98,7 +98,7 @@ dangerous-h2c = []
 
 [dependencies]
 actix-codec = "0.5"
-actix-http = { version = "3.12.0", features = ["http2", "ws"] }
+actix-http = { version = "3.12.1", features = ["http2", "ws"] }
 actix-rt = { version = "2.1", default-features = false }
 actix-service = "2"
 actix-tls = { version = "3.4", features = ["connect", "uri"] }