diff --git a/pyproject.toml b/pyproject.toml
index 63e18a5..bcb05db 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ authors = ["Adam Goldsmith <adam@adamgoldsmith.name>"]
 python = "^3.7"
 requests = "^2.23.0"
 "ruamel.yaml" = "^0.17.20"
-bitstring = "^3.1.6"
+bitstring = "^4.0.0"
 lxml = "^4.5.0"
 peewee = "^3.13.2"
 mysqlclient = "^2.1.0"