diff --git a/binder/environment.yml b/binder/environment.yml
index b7f6cf5..5f342b3 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -13,7 +13,7 @@ dependencies:
   # runtime dependencies
   - python >=3.10,<3.11.0a0
   - jupyterlab >=4.1.0,<5
-  - jupyterlab-server >=2.25.2
+  - jupyterlab_server >=2.25.2
   # lab dev
   - hatch
   - build
diff --git a/pyproject.toml b/pyproject.toml
index 046ca4d..fb44f85 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
 ]
 dependencies = [
-    "jupyterlab-server>=2.25.2",
+    "jupyterlab_server>=2.25.2",
     "jupyterlab>=4.1.0,<5"
 ]
 dynamic = ["version", "description", "authors", "urls", "keywords"]