diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1254917..478a1f5 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,7 +8,8 @@
     strategy:
       matrix:
         # os: [ubuntu-18.04, windows-2019, macos-10.15]
-        os: [ubuntu-18.04]
+        os: [ubuntu-18.04, windows-2019]
+        # os: [ubuntu-18.04]
         USE_MBEDTLS: ["ON", "OFF"]
         USE_CONTEXT: ["ON", "OFF"]
         CMAKE_OPTIONS:
@@ -35,10 +36,10 @@
       #     brew upgrade
       #     brew install cmake openssl
 
-      # - name: setup (windows)
-      #   if: startsWith(matrix.os, 'windows')
-      #   run: |
-      #     choco install openssl cmake
+      - name: setup (windows)
+        if: startsWith(matrix.os, 'windows')
+        run: |
+          choco install openssl cmake
 
       - name: Create Build directory
         run: cmake -E make_directory ${{runner.workspace}}/build