diff --git a/CHANGELOG.md b/CHANGELOG.md
index 532f2ae9..1a6917f0 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 3.33.1.
+
 - Update `just@latest` to 1.43.1.
 
 ## [2.62.50] - 2025-11-12
diff --git a/manifests/protoc.json b/manifests/protoc.json
index 21245ba6..b9c5b1f8 100644
--- a/manifests/protoc.json
+++ b/manifests/protoc.json
@@ -3,13 +3,50 @@
   "template": null,
   "license_markdown": "[BSD-3-Clause](https://github.com/protocolbuffers/protobuf/blob/HEAD/LICENSE)",
   "latest": {
-    "version": "3.33.0"
+    "version": "3.33.1"
   },
   "3": {
-    "version": "3.33.0"
+    "version": "3.33.1"
   },
   "3.33": {
-    "version": "3.33.0"
+    "version": "3.33.1"
+  },
+  "3.33.1": {
+    "x86_64_linux_gnu": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v33.1/protoc-33.1-linux-x86_64.zip",
+      "etag": "0x8DE2236DC41B302",
+      "checksum": "f3340e28a83d1c637d8bafdeed92b9f7db6a384c26bca880a6e5217b40a4328b"
+    },
+    "x86_64_macos": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v33.1/protoc-33.1-osx-x86_64.zip",
+      "etag": "0x8DE2236DC6D25F8",
+      "checksum": "e20b5f930e886da85e7402776a4959efb1ed60c57e72794bcade765e67abaa82"
+    },
+    "x86_64_windows": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v33.1/protoc-33.1-win64.zip",
+      "etag": "0x8DE2236DCC26012",
+      "checksum": "d7a207fb6eec0e4b1b6613be3b7d11905375b6fd1147a071116eb8e9f24ac53b"
+    },
+    "aarch64_linux_gnu": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v33.1/protoc-33.1-linux-aarch_64.zip",
+      "etag": "0x8DE2236DBCC91C2",
+      "checksum": "6018147740548e0e0f764408c87f4cd040e6e1c1203e13aeacaf811892b604f3"
+    },
+    "aarch64_macos": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v33.1/protoc-33.1-osx-aarch_64.zip",
+      "etag": "0x8DE2236DC40073A",
+      "checksum": "db7e66ff7f9080614d0f5505a6b0ac488cf89a15621b6a361672d1332ec2e14e"
+    },
+    "powerpc64le_linux_gnu": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v33.1/protoc-33.1-linux-ppcle_64.zip",
+      "etag": "0x8DE2236DBCED90C",
+      "checksum": "01d54870bc5887fc0afc92fd809d12de73e2e8cc42095b20ea0da98b06063c95"
+    },
+    "s390x_linux_gnu": {
+      "url": "https://github.com/protocolbuffers/protobuf/releases/download/v33.1/protoc-33.1-linux-s390_64.zip",
+      "etag": "0x8DE2236DBDB2740",
+      "checksum": "c12fb49fd4479180851270c664197922ece3834f14ded53376bfc0bc4b625597"
+    }
   },
   "3.33.0": {
     "x86_64_linux_gnu": {