diff --git a/Cargo.lock b/Cargo.lock
index 717a59c9ad62b..ab15a5622e153 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -10205,7 +10205,7 @@ dependencies = [
 
 [[package]]
 name = "vector"
-version = "0.40.0"
+version = "0.40.1"
 dependencies = [
  "apache-avro",
  "approx",
diff --git a/Cargo.toml b/Cargo.toml
index dd84977d615b3..172cc0d09cce8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "vector"
-version = "0.40.0"
+version = "0.40.1"
 authors = ["Vector Contributors <vector@datadoghq.com>"]
 edition = "2021"
 description = "A lightweight and ultra-fast tool for building observability pipelines"
diff --git a/changelog.d/21067_reduce.fix.md b/changelog.d/21067_reduce.fix.md
deleted file mode 100644
index 67af1e4e16374..0000000000000
--- a/changelog.d/21067_reduce.fix.md
+++ /dev/null
@@ -1 +0,0 @@
-Fixes a Vector v0.40.0 regression where the `reduce` transform would not group top level objects correctly.
diff --git a/distribution/install.sh b/distribution/install.sh
index 58bfe4e0cd13a..b1298945c8d58 100755
--- a/distribution/install.sh
+++ b/distribution/install.sh
@@ -13,7 +13,7 @@ set -u
 # If PACKAGE_ROOT is unset or empty, default it.
 PACKAGE_ROOT="${PACKAGE_ROOT:-"https://packages.timber.io/vector"}"
 # If VECTOR_VERSION is unset or empty, default it.
-VECTOR_VERSION="${VECTOR_VERSION:-"0.40.0"}"
+VECTOR_VERSION="${VECTOR_VERSION:-"0.40.1"}"
 _divider="--------------------------------------------------------------------------------"
 _prompt=">>>"
 _indent="   "
diff --git a/website/content/en/releases/0.40.1.md b/website/content/en/releases/0.40.1.md
new file mode 100644
index 0000000000000..5e9ff496c086c
--- /dev/null
+++ b/website/content/en/releases/0.40.1.md
@@ -0,0 +1,4 @@
+---
+title: Vector v0.40.1 release notes
+weight: 21
+---
diff --git a/website/cue/reference/releases/0.40.0.cue b/website/cue/reference/releases/0.40.0.cue
index e34d72609e86d..e7c017578cd31 100644
--- a/website/cue/reference/releases/0.40.0.cue
+++ b/website/cue/reference/releases/0.40.0.cue
@@ -15,6 +15,10 @@ releases: "0.40.0": {
 		This release contains a mix of enhancements and bug fixes. See the changelog below.
 		"""
 
+	known_issues: [
+		"A regression in the `reduce` transform caused it to not group top level objects correctly (see [#21065](https://github.com/vectordotdev/vector/issues/21065)). This is fixed in v0.40.1.",
+	]
+
 	changelog: [
 		{
 			type: "enhancement"
diff --git a/website/cue/reference/releases/0.40.1.cue b/website/cue/reference/releases/0.40.1.cue
new file mode 100644
index 0000000000000..7219b58425fb2
--- /dev/null
+++ b/website/cue/reference/releases/0.40.1.cue
@@ -0,0 +1,36 @@
+package metadata
+
+releases: "0.40.1": {
+	date:     "2024-08-26"
+	codename: ""
+
+	whats_next: []
+
+	description: """
+		The Vector team is pleased to announce version 0.40.1!
+
+		This is the first release with packages signed with the new GPG key as part of [Datadog's key
+		rotation](https://docs.datadoghq.com/agent/guide/linux-key-rotation-2024/?tab=debianubuntu).
+		This should be a transparent change for users as the package repository setup script
+		[setup.vector.dev](https://setup.vector.dev) has already been importing the new key;
+		however, if you were manually managing the trusted GPG keys, you will need to update to
+		the newer ones (either [apt](https://keys.datadoghq.com/DATADOG_APT_KEY_C0962C7D.public) or
+		[rpm](https://keys.datadoghq.com/DATADOG_RPM_KEY_B01082D3.public).
+
+		This release also fixes a regression in Vector v0.40.0.
+		"""
+
+	changelog: [
+		{
+			type: "fix"
+			description: """
+				Fixes a Vector v0.40.0 regression where the `reduce` transform would not group top
+				level objects correctly.
+				"""
+		},
+	]
+
+	commits: [
+		{sha: "e9455f6596a138fc8d0ea978897b7a697c77fbb3", date: "2024-08-17 05:29:36 UTC", description: "use the correct merge strategy for top level objects", pr_number: 21067, scopes: ["reduce transform"], type: "fix", breaking_change: false, author: "Pavlos Rontidis", files_count: 4, insertions_count: 332, deletions_count: 36},
+	]
+}
diff --git a/website/cue/reference/versions.cue b/website/cue/reference/versions.cue
index cb98db8d228a3..7d573a2773148 100644
--- a/website/cue/reference/versions.cue
+++ b/website/cue/reference/versions.cue
@@ -2,6 +2,7 @@ package metadata
 
 // This has to be maintained manually because there's currently no way to sort versions programmatically
 versions: [string, ...string] & [
+	"0.40.1",
 	"0.40.0",
 	"0.39.0",
 	"0.38.0",