diff --git a/Project.toml b/Project.toml
index eb717bce5..42bfa0217 100644
--- a/Project.toml
+++ b/Project.toml
@@ -54,6 +54,7 @@ ManifoldDiff = "0.3.7"
 ManifoldsBase = "0.15.8"
 Markdown = "1.6"
 MatrixEquations = "2.2"
+NLsolve = "4"
 NonlinearSolve = "1 - 3.7.3, 3.8.3"
 OrdinaryDiffEq = "6.31"
 Plots = "1"