diff --git a/setup.py b/setup.py
index dcee8a81..22939959 100644
--- a/setup.py
+++ b/setup.py
@@ -30,7 +30,7 @@
         "requests>=2.23.0",
         "monty>=2021.3.12",
         "emmet-core>=0.54.0",
-        "boto3"
+        "boto3",
     ],
     extras_require={
         "all": ["emmet-core[all]>=0.54.0", "custodian", "mpcontribs-client", "boto3"],