diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c3d57c0..a6dbe39 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -94,6 +94,9 @@ jobs:
           - os: macos-latest
             python-version: "3.10"
             toxenv: py310
+          - os: windows-latest
+            python-version: "3.10"
+            toxenv: py310
     steps:
       - name: Check out repository
         uses: actions/checkout@v4
diff --git a/README.rst b/README.rst
index 6502309..1ede29a 100644
--- a/README.rst
+++ b/README.rst
@@ -15,7 +15,6 @@ sphinx-versioned-docs
 +-------------------------+-----------------------+
 
 Sphinx extension that allows building versioned docs for self-hosting.
-Supported on Linux and macOS.
 
 It works by producing docs for all(specified) branches in separate folders and injects a readthedocs-like version selector menu/badge.
 
diff --git a/docs/changes/76.feature.rst b/docs/changes/76.feature.rst
new file mode 100644
index 0000000..4b98f4a
--- /dev/null
+++ b/docs/changes/76.feature.rst
@@ -0,0 +1 @@
+Adds windows compatibility.
diff --git a/tests/test_multicommit_injection.py b/tests/test_multicommit_injection.py
index 6a9e033..9ad14bb 100644
--- a/tests/test_multicommit_injection.py
+++ b/tests/test_multicommit_injection.py
@@ -61,7 +61,7 @@ def test_file_content(ver, expected):
 
     # Verify the contents of `example.html`, if expected
     data = None
-    with open(OUTPATH / ver / file) as f:
+    with open(OUTPATH / ver / file, encoding="utf8") as f:
         data = f.read()
     for content in content_to_verify.split():
         assert content in data
@@ -74,7 +74,7 @@ def test_injected_hyperlinks(ver, file):
     assert (OUTPATH / ver / file).is_file()
 
     data = None
-    with open(OUTPATH / ver / file) as f:
+    with open(OUTPATH / ver / file, encoding="utf8") as f:
         data = f.read()
     soup = bs(data, features="html.parser")
     injected_code = soup.find_all(class_="injected")
diff --git a/tox.ini b/tox.ini
index dba83f0..4b6078c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,6 +27,8 @@ commands =
 
 # test a multi-commit repository with `sphinx_rtd_theme` and injection tests
 [testenv]
+# Windows compatibility GitPython/issues/356
+passenv = USERNAME
 changedir = .tmp/{envname}
 description = build `sphinx_rtd_theme` with prebuild for a multi-commit git-repo
 extras = tests