diff --git a/INTEROP.md b/INTEROP.md
index dd5551a5bd..7e22eb70f6 100644
--- a/INTEROP.md
+++ b/INTEROP.md
@@ -2,9 +2,6 @@
 
 This README details how to setup Prysm for interop testing for usage with other Ethereum 2.0 clients.
 
-**WARNING**: The tool can only generate up to 190 private keys at the moment, as there is a BLS bug that
-prevents deterministically generating more keys than those. 
-
 ## Installation & Setup
 
 1. Install [Bazel](https://docs.bazel.build/versions/master/install.html) **(Recommended)**
@@ -34,10 +31,10 @@ You can use `bazel run //tools/genesis-state-gen` to create a deterministic gene
 - **--output-ssz** string: Output filename of the SSZ marshaling of the generated genesis state
 
 The example below creates 64 validator keys, instantiates a genesis state with those 64 validators and with genesis unix timestamp 1567542540,
-and finally writes a YAML encoded output to ~/Desktop/genesis.yaml. This file can be used to kickstart the beacon chain in the next section.
+and finally writes a ssz encoded output to ~/Desktop/genesis.ssz. This file can be used to kickstart the beacon chain in the next section.
 
 ```
-bazel run //tools/genesis-state-gen -- --output-yaml ~/Desktop/genesis.yaml --num-validators 64 --genesis-time 1567542540
+bazel run //tools/genesis-state-gen -- --output-ssz ~/Desktop/genesis.ssz --num-validators 64 --genesis-time 1567542540
 ```
 
 ## Launching a Beacon Node + Validator Client