diff --git a/textium/Cargo.toml b/textium/Cargo.toml
index d59028d..c7ccc3c 100644
--- a/textium/Cargo.toml
+++ b/textium/Cargo.toml
@@ -6,6 +6,8 @@ authors = ["Erin <erin@hashbang.sh>"]
 [dependencies]
 glium = "0.17"
 rusttype = "0.2.1"
+num-traits = "0.1.40"
 
 [dev-dependencies]
 image = "0.15"
+cgmath = "0.15"
diff --git a/textium/src/lib.rs b/textium/src/lib.rs
index f7888b2..f44c85c 100644
--- a/textium/src/lib.rs
+++ b/textium/src/lib.rs
@@ -8,6 +8,7 @@
 extern crate rusttype;
 #[macro_use]
 extern crate glium;
+extern crate num_traits;
 
 mod error;
 pub mod texture;