diff --git a/setup.py b/setup.py
index 6b8520075..df95d99d3 100644
--- a/setup.py
+++ b/setup.py
@@ -583,7 +583,7 @@ setup(
         "eth-typing>=2.1.0,<3.0.0",
         "pycryptodome==3.9.4",
         "py_ecc==5.1.0",
-        "milagro_bls_binding==1.6.2",
+        "milagro_bls_binding==1.6.3",
         "dataclasses==0.6",
         "remerkleable==0.1.18",
         "ruamel.yaml==0.16.5",