diff --git a/Cargo.toml b/Cargo.toml
index 69b3aac..a225d41 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,7 +37,7 @@ proptest = { version = "1", optional = true }
 
 [dev-dependencies]
 proptest = "1"
-proptest-derive = "0.3"
+proptest-derive = "0.6"
 criterion = "0.3"
 rand = "0.8"
 serde_test = "1"