diff --git a/Project.toml b/Project.toml
index 00d783e4f3..1ee099abc7 100644
--- a/Project.toml
+++ b/Project.toml
@@ -42,6 +42,7 @@ Flux = "0.11.0, 0.12"
 ForwardDiff = "0.10"
 GalacticOptim = "1"
 LoggingExtras = "0.4"
+Optim = "1"
 ProgressLogging = "0.1"
 RecursiveArrayTools = "2"
 Reexport = "1"