diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d915edc..bb4dc29 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,15 +4,18 @@ on: [push, pull_request]
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        nim: [2.2.4]
+        nim: [2.2.6]
+        os: [ubuntu-latest, macOS-latest, windows-latest]
     steps:
     - uses: actions/checkout@v2
-    - uses: iffy/install-nim@v5
+    - name: Install Nim
+      uses: jiro4989/setup-nim-action@v2
       with:
-        version: ${{ matrix.nim }}
+        nim-version: ${{ matrix.nim }}
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
     - name: Install dependencies
       run: nimble install -d -y
     - name: Test
diff --git a/groth16.nimble b/groth16.nimble
index e2a85fe..b95697a 100644
--- a/groth16.nimble
+++ b/groth16.nimble
@@ -8,4 +8,4 @@ binDir      = "build"
 namedBin    = {"cli/cli_main": "nim-groth16"}.toTable()
 
 requires "https://github.com/status-im/nim-taskpools"
-requires "https://github.com/mratsim/constantine >= 0.2.0"
\ No newline at end of file
+requires "https://github.com/durability-labs/constantine#v0.2.0-fix-nimble-windows"