diff --git a/Project.toml b/Project.toml
index 06f2d0e..d7a10b9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -22,5 +22,6 @@ IrrationalConstants = "0.2"
 SliceMap = "0.2"
 SpecialFunctions = "2"
 SymbolicUtils = "1"
+Symbolics = "5"
 Zygote = "0.6.55"
 julia = "1.6"