diff --git a/docs/Project.toml b/docs/Project.toml
index dffb4fce9..871705487 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -14,5 +14,6 @@ DifferentialEquations = "7.6"
 Documenter = "1"
 IfElse = "0.1"
 ModelingToolkit = "9"
+ModelingToolkitStandardLibrary = "2"
 OrdinaryDiffEq = "6.31"
 Plots = "1.36"