diff --git a/setup.py b/setup.py
index fcb7980b..cae7726f 100644
--- a/setup.py
+++ b/setup.py
@@ -73,7 +73,7 @@
 pkg_json = json.loads((HERE / "jupyterlab-server-proxy" / "package.json").read_bytes())
 
 setup_args = dict(
-    name=name,
+    name=name.replace("_", "-"),
     version=pkg_json["version"],
     url=pkg_json["homepage"],
     author=pkg_json["author"]["name"],