diff --git a/S/StanOptimize/Versions.toml b/S/StanOptimize/Versions.toml
index e3253c0929b16c5..459990db19cedde 100644
--- a/S/StanOptimize/Versions.toml
+++ b/S/StanOptimize/Versions.toml
@@ -105,3 +105,6 @@ git-tree-sha1 = "3e5d4416cf2d117b070812296c5ce7a698cc88ce"
 
 ["4.0.0"]
 git-tree-sha1 = "508aed26ad817da8149303cadebf4b3702909a7e"
+
+["4.0.1"]
+git-tree-sha1 = "511d1bc996c90e6a19a6ea1769c382beaa7fd593"