diff --git a/Project.toml b/Project.toml
index b9c4f41..a3f204a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -18,6 +18,7 @@ LaTeXStrings = "1.3.0"
 Plots = "1.26"
 Reexport = "0.2.0"
 Roots = "1.3"
+SpecialFunctions = "2"
 ViscousFlow = "0.5.1"
 julia = "1.6"