diff --git a/postgres-derive/Cargo.toml b/postgres-derive/Cargo.toml
index 5d1604b24..cbae6c77b 100644
--- a/postgres-derive/Cargo.toml
+++ b/postgres-derive/Cargo.toml
@@ -15,4 +15,4 @@ test = false
 syn = "2.0"
 proc-macro2 = "1.0"
 quote = "1.0"
-heck = "0.4"
+heck = "0.5"