From ea83f9dd71cd7455083d5741c4a83cee1c2a41b1 Mon Sep 17 00:00:00 2001
From: Jinzhe Zeng <jinzhe.zeng@rutgers.edu>
Date: Sat, 28 Jan 2023 16:13:29 -0500
Subject: [PATCH] pin parmed version for py37

The new version of parmed drops Python 3.7. However, it did not set `requires-python`, making pip on Python 3.7 still installs the latest version.
---
 pyproject.toml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index ee926aaeb..8c1dac023 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,10 @@ dpdata = "dpdata.cli:dpdata_cli"
 
 [project.optional-dependencies]
 ase = ['ase']
-amber = ['parmed']
+amber = [
+    'parmed; python_version >= "3.8"',
+    'parmed<4; python_version < "3.8"',
+]
 pymatgen = ['pymatgen']
 docs = [
     'sphinx',