diff --git a/Cargo.toml b/Cargo.toml
index 8b7ccaca..5334ac6c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rhai"
-version = "0.5.1"
+version = "0.6.0"
 authors = ["Jonathan Turner", "Lukáš Hozda"]
 description = "Embedded scripting for Rust"
 homepage = "https://github.com/jonathandturner/rhai"
diff --git a/src/parser.rs b/src/parser.rs
index 2561b7a2..667f424c 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -23,10 +23,6 @@ impl Error for LexError {
             LexError::Nothing => "This error is for internal use only"
         }
     }
-
-    fn cause(&self) -> Option<&Error> {
-        None
-    }
 }
 
 impl fmt::Display for LexError {