diff --git a/Project.toml b/Project.toml
index c0ec43f..42985f9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -11,6 +11,7 @@ MacroTools = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
 NLsolve = "2774e3e8-f4cf-5e23-947b-6d7e65073b56"
 
 [compat]
+NLsolve = "4"
 MacroTools = "0.5"
 Crayons = "4"
 julia = "1"