diff --git a/RELEASE.md b/RELEASE.md
new file mode 100644
index 000000000..b61180cb5
--- /dev/null
+++ b/RELEASE.md
@@ -0,0 +1,3 @@
+Release type: patch
+
+* Ensure ``tzdata`` dependency is installed on Windows
diff --git a/pyproject.toml b/pyproject.toml
index e0e118f5c..cf3c23c0d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,6 +40,7 @@ dependencies = [
     "unidecode>=1.3.7",
     "backports-zoneinfo>=0.2.1; python_version < \"3.9\"",
     "watchfiles>=0.21.0",
+    "tzdata; sys_platform == 'win32'",
 ]
 
 [project.optional-dependencies]
diff --git a/requirements/test.pip b/requirements/test.pip
index 87869e67d..8eb1029f1 100644
--- a/requirements/test.pip
+++ b/requirements/test.pip
@@ -3,7 +3,6 @@ Pygments==2.14.0
 pytest
 pytest-cov
 pytest-xdist[psutil]
-tzdata
 
 # Optional Packages
 Markdown==3.5.1