diff --git a/bucket/b3sum.json b/bucket/b3sum.json
new file mode 100644
index 0000000000..d5d898092b
--- /dev/null
+++ b/bucket/b3sum.json
@@ -0,0 +1,21 @@
+{
+    "version": "0.3.4",
+    "description": "Command line utility prints the BLAKE3 hashes of files or of standard input",
+    "homepage": "https://github.com/BLAKE3-team/BLAKE3",
+    "license": "CC0-1.0|Apache-2.0",
+    "architecture": {
+        "64bit": {
+            "url": "https://github.com/BLAKE3-team/BLAKE3/releases/download/0.3.4/b3sum_windows_x64_bin.exe#/b3sum.exe",
+            "hash": "6ace173e24a90a8355cf0bb0348a9ebc5921ad31398a7614ff2bdb33eb00734d"
+        }
+    },
+    "bin": "b3sum.exe",
+    "checkver": "github",
+    "autoupdate": {
+        "architecture": {
+            "64bit": {
+                "url": "https://github.com/BLAKE3-team/BLAKE3/releases/download/$version/b3sum_windows_x64_bin.exe#/b3sum.exe"
+            }
+        }
+    }
+}