diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dbddf1a7bb..2b3fcb8506 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,9 +8,8 @@ env:
   GOPROXY: off
 
 jobs:
-  proto:
-    # TODO: use Windows after merginig https://github.com/containerd/protobuild/pull/51.
-    runs-on: 'ubuntu-20.04'
+  protos:
+    runs-on: 'windows-2019'
     steps:
       - uses: actions/checkout@v2
         with:
@@ -20,29 +19,29 @@ jobs:
           go-version: '^1.15.0'
 
       - name: Install protoc-gen-gogoctrd
-        shell: bash
+        shell: powershell
         run: |
           git clone --depth 1 https://github.com/containerd/containerd.git -b v1.6.0
           cd containerd/cmd/protoc-gen-gogoctrd
           go build
           mkdir $GOPATH/bin
-          mv protoc-gen-gogoctrd $GOPATH/bin
+          mv protoc-gen-gogoctrd.exe $GOPATH/bin
         env:
           GOPATH: ${{ github.workspace }}
 
       - name: Install protoc
-        shell: bash
+        shell: powershell
         run: |
-          curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v3.19.4/protoc-3.19.4-linux-x86_64.zip
-          unzip -x protoc-3.19.4-linux-x86_64.zip
+          Invoke-WebRequest -OutFile protoc.zip -Uri https://github.com/protocolbuffers/protobuf/releases/download/v3.19.4/protoc-3.19.4-win32.zip
+          Expand-Archive -Path protoc.zip
           mv include src/github.com/Microsoft/hcsshim/protobuf
         env:
           GOPATH: ${{ github.workspace }}
 
       - name: Run Protobuild
-        shell: bash
+        shell: powershell
         run: |
-          go install github.com/containerd/protobuild@7e5ee24bc1f70e9e289fef15e2631eb3491320bf
+          go install github.com/containerd/protobuild@f9731edc8a06ed5d5f7dc7c6c0304cd34af13f21
 
           cd src/github.com/Microsoft/hcsshim
           PATH=$GOPATH/bin:$PATH protobuild $(go list ./... | grep -v /vendor/)