diff --git a/test/Project.toml b/test/Project.toml
index 0d8dc65..fb7cb5f 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -18,7 +18,7 @@ DualNumbers = "0.5, 0.6"
 ForwardDiff = "0.10, 1"
 HyperDualNumbers = "4"
 ReverseDiff = "1"
-Symbolics = "6"
+Symbolics = "6, 7"
 TaylorSeries = "0.10, 0.11, 0.12, 0.20"
 Zygote = "0.6, 0.7"
 julia = "1"