diff --git a/src/AstroHelper.jl b/src/AstroHelper.jl
index 70c154f..055a921 100644
--- a/src/AstroHelper.jl
+++ b/src/AstroHelper.jl
@@ -2,6 +2,6 @@ module AstroHelper
 using LinearAlgebra
 
 
-include("Quaternions.jl")
+include("quaternions.jl")
 
 end # module
diff --git a/src/Quaternions.jl b/src/quaternions.jl
similarity index 100%
rename from src/Quaternions.jl
rename to src/quaternions.jl