diff --git a/docs/Project.toml b/docs/Project.toml
index 6db512409c..719bcc3f88 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -38,5 +38,5 @@ SciMLStructures = "1.1"
 StochasticDiffEq = "6"
 SymbolicIndexingInterface = "0.3.1"
 SymbolicUtils = "2, 3"
-Symbolics = "5"
+Symbolics = "5, 6"
 Unitful = "1.12"