diff --git a/Project.toml b/Project.toml
index fae730da8..96fe837df 100644
--- a/Project.toml
+++ b/Project.toml
@@ -30,6 +30,6 @@ ModelingToolkit = "7"
 Nemo = "0.24, 0.25, 0.26, 0.27"
 Primes = "0.5"
 Singular = "0.4, 0.5, 0.6, 0.7, 0.8, 0.9"
-SpecialFunctions = "1"
+SpecialFunctions = "1, 2"
 TestSetExtensions = "2"
 julia = "1.5"