diff --git a/src/conversion_error.rs b/src/conversion_error.rs
index fe73ed8..82d3a43 100644
--- a/src/conversion_error.rs
+++ b/src/conversion_error.rs
@@ -52,7 +52,7 @@ impl Error for ConversionError
       }
    }
 
-   fn get_cause(&self) -> Option<&Error>
+   fn get_cause(&self) -> Option<&dyn Error>
    {
       match *self
       {