diff --git a/README.md b/README.md
index 68f156e..d0aba6c 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ A slimmed down version of CHEBI sufficient to cover 99% of the term needs across
 
 1. Make a Pull request on https://github.com/obophenotype/chebi_obo_slim/blob/main/seed.txt. In the PR, indicate which terms you are adding (at least the ids) and for which ontology.
 2. If you are a member of obophenotype organisation:
-   - You should make sure seed.txt is sorted alphanumerically
+   - You should make sure seed.txt is sorted alphanumerically by running `python scripts/sort.py`
    - Merge the changes without review at your own discretion
 3. If you are not a member of obophenotype organisation:
    - Wait until a member of obophenotype deals with your PR
diff --git a/scripts/sort.py b/scripts/sort.py
new file mode 100644
index 0000000..7b87542
--- /dev/null
+++ b/scripts/sort.py
@@ -0,0 +1,16 @@
+"""Run this script to sort the ``seed.txt`` file."""
+
+from pathlib import Path
+
+HERE = Path(__file__).parent.resolve()
+ROOT = HERE.parent.resolve()
+SEED_PATH = ROOT.joinpath("seed.txt")
+
+
+def main():
+    curies = set(SEED_PATH.read_text().splitlines())
+    SEED_PATH.write_text("\n".join(sorted(curies)))
+
+
+if __name__ == "__main__":
+    main()