diff --git a/dask-gateway-server/setup.py b/dask-gateway-server/setup.py
index 4dc7a0a9..a9db53af 100644
--- a/dask-gateway-server/setup.py
+++ b/dask-gateway-server/setup.py
@@ -98,10 +98,10 @@ def run(self):
 
 
 install_requires = []
-with open('requirements.txt') as f:
+with open("requirements.txt") as f:
     for line in f.readlines():
         req = line.strip()
-        if not req or req.startswith('#'):
+        if not req or req.startswith("#"):
             continue
         install_requires.append(req)
 
diff --git a/dask-gateway/setup.py b/dask-gateway/setup.py
index cbba1d78..4277beb8 100644
--- a/dask-gateway/setup.py
+++ b/dask-gateway/setup.py
@@ -8,10 +8,10 @@
     VERSION = ns["__version__"]
 
 install_requires = []
-with open('requirements.txt') as f:
+with open("requirements.txt") as f:
     for line in f.readlines():
         req = line.strip()
-        if not req or req.startswith('#'):
+        if not req or req.startswith("#"):
             continue
         install_requires.append(req)