diff --git a/README.md b/README.md
index fc574ed..43b9887 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@
 - `detect-aws-credentials` - Checks for the existence of AWS secrets that you
   have set up with the AWS CLI.
   The following arguments are available:
-  - `--credentials-file CREDENTIAL_FILES` - additional AWS CLI style
+  - `--credentials-file CREDENTIALS_FILE` - additional AWS CLI style
     configuration file in a non-standard location to fetch configured
     credentials from. Can be repeated multiple times.
   - `--allow-missing-credentials` - Allow hook to pass when no credentials are