diff --git a/pyproject.toml b/pyproject.toml
index 791ebc1a..66ca3ffc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,6 +44,7 @@ classifiers = [
   "Topic :: Software Development :: Libraries",
   "Topic :: Software Development :: Localization",
   "Topic :: Terminals",
+  "Typing :: Typed",
 ]
 
 [project.urls]
diff --git a/wcwidth/py.typed b/wcwidth/py.typed
new file mode 100644
index 00000000..e69de29b