diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e68a23ee..decdce78 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,9 +8,12 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ${{matrix.os}}-latest
     strategy:
       matrix:
+        os:
+          - ubuntu
+          - windows
         ruby-version:
           - 3.2
           - 3.1
diff --git a/Gemfile b/Gemfile
index daad1030..82339dc3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,6 +6,8 @@ ruby RUBY_VERSION
 
 gemspec
 
+gem "ffi"
+
 group :development, :test do
   gem "bundler"
   gem "overcommit", ">= 0.60"