diff --git a/jupyter_releaser/lib.py b/jupyter_releaser/lib.py
index b53c706c..e48baf79 100644
--- a/jupyter_releaser/lib.py
+++ b/jupyter_releaser/lib.py
@@ -24,7 +24,9 @@
 
 def bump_version(version_spec, version_cmd, changelog_path):
     """Bump the version and verify new version"""
-    version = util.bump_version(version_spec, version_cmd=version_cmd, changelog_path=changelog_path)
+    version = util.bump_version(
+        version_spec, version_cmd=version_cmd, changelog_path=changelog_path
+    )
 
     # A properly parsed version will have a "major" attribute
     parsed = parse_version(version)
@@ -51,7 +53,9 @@ def update_dependencies(python_package, python_packages):
         try:
             i = python_names.index(dep_name)
         except ValueError:
-            raise RuntimeError(f"Package {python_package[1]} depends on {dep_name}, which has not been released yet. Please put the dependency before this package in the python_packages list.")
+            raise RuntimeError(
+                f"Package {python_package[1]} depends on {dep_name}, which has not been released yet. Please put the dependency before this package in the python_packages list."
+            )
         dep_path = python_packages[i][0]
         os.chdir(dep_path)
         deps[dep_name] = util.get_version()
@@ -75,7 +79,6 @@ def _update_dependencies(dependencies, deps):
             dependencies[i] = k + " ==" + v
 
 
-
 def check_links(ignore_glob, ignore_links, cache_file, links_expire):
     """Check URLs for HTML-containing files."""
     cache_dir = osp.expanduser(cache_file).replace(os.sep, "/")