diff --git a/.github/workflows/check-release.yml b/.github/workflows/check-release.yml
index 702e56cc..c88e5980 100644
--- a/.github/workflows/check-release.yml
+++ b/.github/workflows/check-release.yml
@@ -6,7 +6,6 @@ on:
   pull_request:
     branches:
       - main
-    types: [closed]
 
 permissions:
   contents: write
@@ -15,12 +14,14 @@ jobs:
   check_release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
+      - run: ls -al
       - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
       - name: Check Release
         uses: jupyter-server/jupyter_releaser/.github/actions/check-release@v2
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
+      - run: ls -al
       - name: Upload Distributions
         uses: actions/upload-artifact@v4
         with:
diff --git a/MANIFEST.in b/MANIFEST.in
deleted file mode 100644
index 7affaa3a..00000000
--- a/MANIFEST.in
+++ /dev/null
@@ -1,31 +0,0 @@
-include LICENSE
-include *.md
-include pyproject.toml
-recursive-include jupyter-config *.json
-include conftest.py
-
-include package.json
-include install.json
-include ts*.json
-include *.config.js
-include yarn.lock
-
-graft jupyter_scheduler/labextension
-
-# Javascript files
-graft src
-graft style
-graft ui-tests
-prune **/node_modules
-prune lib
-prune binder
-
-# dev scripts
-prune dev
-
-# Patterns to exclude from any directory
-global-exclude *~
-global-exclude *.pyc
-global-exclude *.pyo
-global-exclude .git
-global-exclude .ipynb_checkpoints
diff --git a/package.json b/package.json
index 308de8dd..c4f09895 100644
--- a/package.json
+++ b/package.json
@@ -128,17 +128,5 @@
     "extension": true,
     "outputDir": "jupyter_scheduler/labextension",
     "schemaDir": "schema"
-  },
-  "jupyter-releaser": {
-    "hooks": {
-      "before-build-npm": [
-        "python -m pip install jupyterlab~=4.0",
-        "jlpm",
-        "jlpm build:prod"
-      ],
-      "before-build-python": [
-        "jlpm clean:all"
-      ]
-    }
   }
 }
diff --git a/pyproject.toml b/pyproject.toml
index b297321e..c7aa6cc2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["hatchling>=1.3.1", "jupyterlab~=4.0"]
+requires = ["hatchling>=1.5.0", "jupyterlab>=4.0.0,<5", "hatch-nodejs-version>=0.3.2"]
 build-backend = "hatchling.build"
 
 [project]
@@ -30,15 +30,6 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
 ]
 dependencies = [
-    "jupyter_server>=1.6,<3",
-    "traitlets~=5.0",
-    "nbconvert~=7.0",
-    "pydantic>=1.10,<3",
-    "sqlalchemy>=2.0,<3",
-    "croniter~=1.4",
-    "pytz>=2023.3,<=2024.2",
-    "fsspec>=2023.6.0,<=2024.10.0",
-    "psutil~=5.9"
 ]
 
 [project.optional-dependencies]
@@ -72,14 +63,15 @@ artifacts = ["jupyter_scheduler/labextension"]
 "jupyter-config/nb-config" = "etc/jupyter/jupyter_notebook_config.d"
 
 [tool.hatch.build.targets.sdist]
-exclude = [".github"]
+artifacts = ["jupyter_scheduler/labextension"]
+exclude = [".github", "binder"]
 
 [tool.hatch.build.hooks.jupyter-builder]
 dependencies = ["hatch-jupyter-builder>=0.5"]
 build-function = "hatch_jupyter_builder.npm_builder"
 ensured-targets = [
     "jupyter_scheduler/labextension/static/style.js",
-    "jupyter_scheduler//labextension/package.json",
+    "jupyter_scheduler/labextension/package.json",
 ]
 skip-if-exists = ["jupyter_scheduler/labextension/static/style.js"]
 
@@ -144,6 +136,14 @@ filterwarnings = [
 [tool.jupyter_releaser]
 skip = ["check-links"]
 
+[tool.jupyter-releaser.hooks]
+before-build-npm = [
+    "python -m pip install 'jupyterlab>=4.0.0,<5'",
+    "jlpm",
+    "jlpm build:prod"
+]
+before-build-python = ["jlpm clean:all"]
+
 [tool.mypy]
 check_untyped_defs = true
 disallow_incomplete_defs = true
@@ -155,6 +155,3 @@ strict_equality = true
 warn_unused_configs = true
 warn_unused_ignores = true
 warn_redundant_casts = true
-
-[tool.check-manifest]
-ignore = ["binder/**", "packages/**", "*.json", "*.png", "yarn.lock", ".*", "jupyter_scheduler/labextension/**", "jupyter_scheduler/static/**"]