diff --git a/poppable-derive/Cargo.toml b/poppable-derive/Cargo.toml
index 20e2cdb..53865a5 100644
--- a/poppable-derive/Cargo.toml
+++ b/poppable-derive/Cargo.toml
@@ -10,4 +10,4 @@ quote = "1.0.35"
 syn = "2.0.57"
 
 [lib]
-proc_macro = true
+proc-macro = true