diff --git a/README.md b/README.md
index fb681d5..14cfbd2 100644
--- a/README.md
+++ b/README.md
@@ -25,5 +25,5 @@ python vault-cert-openssh.py ~/.ssh/<your SSH key>-cert.pub
 Prerequisite:
 * Python >=3.7
   * hvac
-  * pipreqs
+  * pipenv
 * Vault