diff --git a/CHANGELOG.md b/CHANGELOG.md
index 796eb5ea..9cbe6e90 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Update `protoc@latest` to 3.27.1.
+
 - Update `just@latest` to 1.28.0.
 
 ## [2.34.3] - 2024-06-04
diff --git a/manifests/protoc.json b/manifests/protoc.json
index 35949698..d46aeefe 100644
--- a/manifests/protoc.json
+++ b/manifests/protoc.json
@@ -3,13 +3,35 @@
   "template": null,
   "license_markdown": "[BSD-3-Clause](https://github.com/protocolbuffers/protobuf/blob/HEAD/LICENSE)",
   "latest": {
-    "version": "3.27.0"
+    "version": "3.27.1"
   },
   "3": {
-    "version": "3.27.0"
+    "version": "3.27.1"
   },
   "3.27": {
-    "version": "3.27.0"
+    "version": "3.27.1"
+  },
+  "3.27.1": {
+    "x86_64_linux_gnu": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v27.1/protoc-27.1-linux-x86_64.zip",
+      "checksum": "8970e3d8bbd67d53768fe8c2e3971bdd71e51cfe2001ca06dacad17258a7dae3"
+    },
+    "x86_64_macos": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v27.1/protoc-27.1-osx-x86_64.zip",
+      "checksum": "8520d944f3a3890fa296a3b3b0d4bb18337337e2526bbbf1b507eeea3c2a1ec4"
+    },
+    "x86_64_windows": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v27.1/protoc-27.1-win64.zip",
+      "checksum": "da531c51ccd1290d8d34821f0ce4e219c7fbaa6f9825f5a3fb092a9d03fe6206"
+    },
+    "aarch64_linux_gnu": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v27.1/protoc-27.1-linux-aarch_64.zip",
+      "checksum": "8809c2ec85368c6b6e9af161b6771a153aa92670a24adbe46dd34fa02a04df2f"
+    },
+    "aarch64_macos": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v27.1/protoc-27.1-osx-aarch_64.zip",
+      "checksum": "03b7af1bf469e7285dc51976ee5fa99412704dbd1c017105114852a37b165c12"
+    }
   },
   "3.27.0": {
     "x86_64_linux_gnu": {