diff --git a/Project.toml b/Project.toml
index ea04e292d..7e1144261 100644
--- a/Project.toml
+++ b/Project.toml
@@ -45,6 +45,7 @@ Requires = "1"
 StatsBase = "0.32.0, 0.33"
 SymbolicRegression = "0.9"
 SymbolicUtils = "0.19"
+Symbolics = "4"
 julia = "1.6"
 
 [extras]