diff --git a/M/MolSimToolkit/Versions.toml b/M/MolSimToolkit/Versions.toml
index a46f167e6ce0d1c..60d2d28a8d04f7d 100644
--- a/M/MolSimToolkit/Versions.toml
+++ b/M/MolSimToolkit/Versions.toml
@@ -12,3 +12,6 @@ git-tree-sha1 = "6339ba801b69b7d4d5ad8c335c79df0748eacc0e"
 
 ["1.3.0"]
 git-tree-sha1 = "0f703683727d718caa49af1f18c24aa653f2e8a2"
+
+["1.3.1"]
+git-tree-sha1 = "3cec7c8a9d4e8fcaa14c6f64e9df056daa7e91f8"