diff --git a/README.md b/README.md
index 3ae7284..00acab4 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,13 @@
-[![Build Status](https://api.cirrus-ci.com/github/cirruslabs/google-storage-proxy.svg)](https://cirrus-ci.com/github/cirruslabs/google-storage-proxy) [![](https://images.microbadger.com/badges/image/cirrusci/google-storage-proxy.svg)](https://microbadger.com/images/cirrusci/google-storage-proxy)
+[![Build Status](https://api.cirrus-ci.com/github/cirruslabs/google-storage-proxy.svg)](https://cirrus-ci.com/github/cirruslabs/google-storage-proxy)
 
 HTTP proxy with REST API to interact with Google Cloud Storage Buckets
 
-Simply allows to use `HEAD`, `GET` or `PUT` requests to check blob's availability, as well as downloading or uploading
+Simply allows using `HEAD`, `GET` or `PUT` requests to check blob's availability, as well as downloading or uploading
 blobs to a specified GCS bucket.
+
+# Arguments
+
+* `port` - optional port to run the proxy on. By default, `8080` is used.
+* `bucket` - GCS bucket name to store artifacts in. You can configure [Lifecycle Management](https://cloud.google.com/storage/docs/lifecycle)
+   for this bucket separately using `gcloud` or UI.
+* `prefix` - optional prefix for all objects. For example, use `--prefix=foo/` to work under `foo` directory in `bucket`.