--- a/taskcluster/ci/toolchain/windows.yml
+++ b/taskcluster/ci/toolchain/windows.yml
@@ -136,34 +136,34 @@ win64-rust-1.19:
         script: repack_rust.py
         arguments: [
             '--channel', '1.19.0',
             '--host', 'x86_64-pc-windows-msvc',
             '--target', 'x86_64-pc-windows-msvc',
         ]
         toolchain-artifact: public/build/rustc.tar.bz2
 
-win32-rust-1.21:
+win32-rust-1.23.0-beta.2:
     description: "rust repack"
     treeherder:
         kind: build
         platform: toolchains/opt
         symbol: TW32(rust)
         tier: 1
     worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
         docker-image: {in-tree: desktop-build}
         max-run-time: 7200
         env:
             UPLOAD_DIR: artifacts
     run:
         using: toolchain-script
         script: repack_rust.py
         arguments: [
-            '--channel', '1.21.0',
+            '--channel', 'beta',
             '--host', 'i686-pc-windows-msvc',
             '--target', 'i686-pc-windows-msvc',
         ]
         toolchain-alias: win32-rust
         toolchain-artifact: public/build/rustc.tar.bz2
 
 mingw32-rust-1.22:
     description: "rust repack"