diff --git a/README.md b/README.md
index c63b5922e..5bc28ccf2 100644
--- a/README.md
+++ b/README.md
@@ -268,11 +268,18 @@ key is used to authenticate to the COP server.
 
 ```
 # cd $COP/bin
-# ./cop client reenroll ../testdata/csr.json http://localhost:8888
+# ./cop client reenroll http://localhost:8888
 ```
 
 The enrollment certificate and enrollment key are stored in the same location as described in the previous section for the `enroll` command.
 
+You can specify a new Certificate Signing Request JSON information when issue the reenroll command
+
+```
+# cd $COP/bin
+# ./cop client reenroll http://localhost:8888 ../testdata/csr.json
+```
+
 ### Register a new user
 
 The user performing the register request must be currently enrolled, and also