diff --git a/setup.py b/setup.py
index 3882aab0..f1cfef45 100755
--- a/setup.py
+++ b/setup.py
@@ -65,7 +65,7 @@
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8'
     ],
-    project_urls: {
+    project_urls={
         'Documentation': 'https://certifiio.readthedocs.io/en/latest/',
         'Source': 'https://github.com/certifi/python-certifi',
     },