diff --git a/Project.toml b/Project.toml
index fa19a7ec7..a09ddb0e2 100644
--- a/Project.toml
+++ b/Project.toml
@@ -27,5 +27,5 @@ IterTools = "1.0"
 LaTeXStrings = "1.0"
 OrdinaryDiffEq = "5.2"
 Plots = "0.24, 0.25, 0.26, 0.27, 0.28"
-Polynomials = "0.6.0"
+Polynomials = "0.6.0, 0.8"
 julia = "1.0"