diff --git a/README.md b/README.md
index 5dd4c5f..47f441d 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,8 @@ Usage of ipfs-sync:
         ignore anything prefixed with "."
   -sync duration
         time to sleep between IPNS syncs (ex: 120s) (default 10s)
+  -timeout version
+        longest time to wait for API calls like version and `files/mkdir` (ex: 60s) (default 30s)
   -v    display verbose output
   -version
         display version and exit