diff --git a/Project.toml b/Project.toml
index 41653922..8e1a298b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -6,6 +6,7 @@ version = "0.9.0"
 [deps]
 IJulia = "7073ff75-c697-5162-941a-fcdaad2a7d2a"
 InteractiveUtils = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
+Markdown = "d6f4376e-aef5-505a-96c1-9c027394607a"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 Weave = "44d3d7a6-8a23-5bf8-98c5-b353f8df5ec9"