diff --git a/README.md b/README.md
index cf52978..719e6d2 100755
--- a/README.md
+++ b/README.md
@@ -119,7 +119,7 @@ environment variables. Below is a list of the required configurations.
 - `BACKEND_TYPE`: The type of backend, either `HAPI` or `GCP`. `HAPI` should be
   used for most FHIR servers, while `GCP` should be used for GCP FHIR stores.
 
-- `CORS_ALLOW_ORIGIN`: Specifies an CORS allowed origin. Only a single origin
+- `CORS_ALLOW_ORIGIN`: Specifies the CORS allowed origin. Only a single origin
   can be specified. It defaults to `*` if not set
 
 **Logging**