diff --git a/Project.toml b/Project.toml
index a995c52..d45fd45 100644
--- a/Project.toml
+++ b/Project.toml
@@ -24,7 +24,7 @@ FileIO = "1"
 HDF5 = "0.15 - 0.17"
 LinearAlgebra = "1"
 Memoization = "0.2"
-SpecialFunctions = "0.8 - 2"
+SpecialFunctions = "0.8 - 0.10, 1, 2"
 Statistics = "1"
 Test = "1"
 WAV = "1"