diff --git a/src/lib.rs b/src/lib.rs
index c42c69a..d74031e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -30,7 +30,7 @@ extern crate serde_derive;
 
 extern crate serde;
 
-#[macro_use]
+#[cfg_attr(test, macro_use)]
 extern crate serde_json;
 
 #[macro_use]