diff --git a/Project.toml b/Project.toml
index 9fac761..3adb34d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -33,7 +33,7 @@ Documenter = "0.27"
 GLM = "1"
 OrdinalMultinomialModels = "0.3.4"
 SnpArrays = "0.3.9"
-SpecialFunctions = "0.10, 1"
+SpecialFunctions = "0.10, 1, 2"
 StatsBase = "0.33"
 StatsFuns = "0.9"
 StatsModels = "0.6"