diff --git a/README.md b/README.md
index de9e78d..fcf9d33 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ environment variables is used in this image:
 
 * `PROXY_HOST`: Host name of the service to proxy
 * `PROXY_PORT`: Port of the service to proxy
-* `PROXY_PROTOCOL`: Protofol to the service to proxy (`http` or `https`)
+* `PROXY_PROTOCOL`: Protocol to the service to proxy (`http` or `https`)
 
 * `ADD_HOST_HEADER`: pass the proxy host header downstream (`true` or `false`)