diff --git a/Project.toml b/Project.toml
index 79d805a..33262d4 100644
--- a/Project.toml
+++ b/Project.toml
@@ -4,12 +4,10 @@ authors = ["Qi Zhang <singularitti@outlook.com>"]
 version = "0.1.0"
 
 [deps]
-Crystallography = "3bff3928-7a76-11e9-2089-d112443085a5"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 Tensorial = "98f94333-fa9f-48a9-ad80-1c66397b2b38"
 
 [compat]
-Crystallography = "0.2, 0.3"
 Tensorial = "0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.10"
 julia = "1"