diff --git a/Cargo.toml b/Cargo.toml
index aba6c60..a9a0bb9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ zeroize = "1.1.0"
 [dev-dependencies]
 bincode = "1.2.1"
 proptest = "0.10"
-proptest-derive = "0.2.0"
+proptest-derive = "0.3.0"
 
 [features]
 nightly = []