diff --git a/docs/Project.toml b/docs/Project.toml
index ae87e81c..312695cb 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -37,6 +37,7 @@ JSON3 = "1.14"
 MINPACK = "1.3"
 MadNLP = "0.8"
 NLPModelsIpopt = "0.10"
+OrdinaryDiffEq = "6"
 Percival = "0.7"
 Plots = "1.40"
 Roots = "2.1"