diff --git a/documents/PREREQUISITES.md b/documents/PREREQUISITES.md
index 545392a1..99273ee9 100644
--- a/documents/PREREQUISITES.md
+++ b/documents/PREREQUISITES.md
@@ -1,6 +1,6 @@
 # PREREQUISITES
 
-## Python 3.7 of higher
+## Python 3.7 or higher
 
 How you install Python varies from platform to platform. Below are the instructions for Windows, MacOS, and Linux: