diff --git a/pyproject.toml b/pyproject.toml
old mode 100755
new mode 100644
index a117a70..5383ca1
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ dependencies = [
 ]
 
 [build-system]
-requires = ["flit_core >=3.4,<4"]
+requires = ["flit_core >=3.12.0,<4"]
 build-backend = "flit_core.buildapi"
 
 # These dependencies are only installed when developer mode is enabled