diff --git a/pyproject.toml b/pyproject.toml
index 73035928b1..32b36787f7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
-# Build-system section
 [build-system]
-requires = ["hatchling>=0.21.0"]
+# hatchling pinned for reproducibility: version should be kept up-to-date
+requires = ["hatchling==0.22.0"]
 build-backend = "hatchling.build"
 
 [project]