diff --git a/docs/Project.toml b/docs/Project.toml
index d5d0545f8..c8c79659a 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -62,7 +62,7 @@ Optimization = "3"
 OptimizationNLopt = "0.1"
 OrdinaryDiffEq = "6.31"
 Plots = "1"
-RecursiveArrayTools = "2"
+RecursiveArrayTools = "2, 3"
 SDEProblemLibrary = "0.1"
 SciMLBase = "2"
 SciMLOperators = "0.3"