diff --git a/docs/Project.toml b/docs/Project.toml
index b51530c9d0..5878b56fb3 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -37,6 +37,7 @@ BenchmarkTools = "1.3"
 BifurcationKit = "0.4, 0.5"
 CairoMakie = "0.13, 0.15"
 CommonSolve = "0.2"
+ControlSystemsBase = "1"
 DataInterpolations = "6.5, 8"
 DiffEqDevTools = "2"
 Distributions = "0.25"