diff --git a/pyproject.toml b/pyproject.toml
index f93dc23..bb82fb6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "stsci.imagestats"
 description = "Compute sigma-clipped statistics on data arrays"
-requires-python = ">=3.6"
+requires-python = ">=3.8"
 authors = [
     { name = "Warren Hack", email = "help@stsci.edu" },
     { name = "Christopher Hanley" },