diff --git a/extensions/readme.md b/extensions/readme.md
index 188fd496f..61377f35a 100644
--- a/extensions/readme.md
+++ b/extensions/readme.md
@@ -12,7 +12,7 @@ Here are some sample calls, which vary which extensions are included.
 
 **Using Python 3**:
 
-    python3 updateHostsFile.py -a --extensions porn social gambling
+    python3 updateHostsFile.py -auto --extensions porn social gambling
 
 or, in short form:
 
@@ -22,7 +22,7 @@ or, in short form:
 
 **Using Python 2.7**:
 
-    python updateHostsFile.py -a --extensions porn social gambling
+    python updateHostsFile.py -auto --extensions porn social gambling
 
 or, in short form: