diff --git a/schala-lang/language/Cargo.toml b/schala-lang/language/Cargo.toml
index 4862706..9c891ad 100644
--- a/schala-lang/language/Cargo.toml
+++ b/schala-lang/language/Cargo.toml
@@ -8,6 +8,8 @@ itertools = "0.5.8"
 take_mut = "0.1.3"
 maplit = "*"
 lazy_static = "0.2.8"
+failure = "0.1.2"
+
 
 schala-lang-codegen = { path = "../codegen" }
 schala-repl = { path = "../../schala-repl" }