diff --git a/pyproject.toml b/pyproject.toml
index 071a1b476..4254191ec 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ flake8 = "^3.8.4"
 cipheydists = "^0.3.34"
 cipheycore = "^0.3.2"
 appdirs = "^1.4.4"
-typing_inspect = { version = "^0.6.0", python = "~3.7" }
+typing_inspect = { version = ">=0.6,<0.8", python = "~3.7" }
 base58 = "^2.0.1"
 base91 = "^1.0.1"
 pybase62 = "^0.4.3"