diff --git a/pyproject.toml b/pyproject.toml
index bb7a44d5..e561df09 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ msft-utils = [
   "azure-keyvault==4.1.0",
   "msrestazure>=0.6.4",
   "azure-mgmt-resource>=12.1.0",
-  "python-dotenv>=0.14.0,<0.20.0"
+  "python-dotenv>=0.14.0,<0.22.0"
 ]
 
 [tool.flit.module]