diff --git a/Project.toml b/Project.toml
index 718f2cc..10b4a6c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -37,6 +37,6 @@ QuantumInterface = "0.4.1"
 QuantumOpticsBase = "0.5.6"
 QuantumToolbox = "0.34.0"
 SymbolicUtils = "3.13"
-Symbolics = "6"
+Symbolics = "6, 7.1"
 TermInterface = "2"
 julia = "1.10"