diff --git a/O/Optim/Versions.toml b/O/Optim/Versions.toml
index 83dedcc61d73b35..7cf884bf53cd3c1 100644
--- a/O/Optim/Versions.toml
+++ b/O/Optim/Versions.toml
@@ -141,3 +141,6 @@ git-tree-sha1 = "01f85d9269b13fedc61e63cc72ee2213565f7a72"
 
 ["1.8.0"]
 git-tree-sha1 = "f55af9918e2a67dcadf5ec758a5ff25746c3819f"
+
+["1.9.0"]
+git-tree-sha1 = "931b2ecf1b43de06dddc342c6af03f2b11434958"