diff --git a/notebooks/Project.toml b/notebooks/Project.toml
index 58a34bd..cd9d00e 100644
--- a/notebooks/Project.toml
+++ b/notebooks/Project.toml
@@ -4,5 +4,6 @@ Graphs = "86223c79-3864-5bf0-83f7-82e725a168b6"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 LuxorGraphPlot = "1f49bdf2-22a7-4bc4-978b-948dc219fbbc"
 PlutoSliderServer = "2fc8631c-6f24-4c5b-bca7-cbb509c42db4"
+PlutoUI = "7f904dfe-b85e-4ff6-b463-dae2292396a8"
 Revise = "295af30f-e4ad-537b-8983-00126c2a3abe"
 UnitDiskMapping = "1b61a8d9-79ed-4491-8266-ef37f39e1727"
diff --git a/notebooks/tutorial.jl b/notebooks/tutorial.jl
index bf8f309..7488869 100644
--- a/notebooks/tutorial.jl
+++ b/notebooks/tutorial.jl
@@ -1,5 +1,5 @@
 ### A Pluto.jl notebook ###
-# v0.19.19
+# v0.19.27
 
 using Markdown
 using InteractiveUtils