diff --git a/Project.toml b/Project.toml
index e5b5c1d..49fed8a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -9,6 +9,7 @@ SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
 
 [compat]
 Distributions = "0.25"
+SpecialFunctions = "2"
 Test = "1.6"
 TestItemRunner = "0.2"
 julia = "1.6.7"