diff --git a/docs/Project.toml b/docs/Project.toml
index 8588965..941dc08 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -23,4 +23,4 @@ OrdinaryDiffEq = "=6.74.1"
 Plots = "1"
 Setfield = "1"
 Sundials = "4"
-Symbolics = "5"
+Symbolics = "5, 6"