diff --git a/Project.toml b/Project.toml
index c65032d64..f7ec8aa46 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,7 +21,7 @@ Compat = "2.2, 3"
 Distances = "0.9.1, 0.10"
 Functors = "0.1"
 Requires = "1.0.1"
-SpecialFunctions = "0.8, 0.9, 0.10"
+SpecialFunctions = "0.8, 0.9, 0.10, 1.1"
 StatsBase = "0.32, 0.33"
 StatsFuns = "0.8, 0.9"
 ZygoteRules = "0.2"