diff --git a/pyproject.toml b/pyproject.toml
index 58d1886..967ec24 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,7 @@ dynamic = ["version"]
 license = {file = "LICENSE"}
 name = "cads-api-client"
 readme = "README.md"
+requires-python = ">=3.8"
 
 [tool.coverage.run]
 branch = true