diff --git a/proptest-derive/Cargo.toml b/proptest-derive/Cargo.toml
index bfa0cd6b..455883a8 100644
--- a/proptest-derive/Cargo.toml
+++ b/proptest-derive/Cargo.toml
@@ -34,7 +34,7 @@ criterion = "0.5"
 [dependencies]
 proc-macro2 = "1.0"
 
-syn = { version = "1.0.0", features = ["visit", "extra-traits", "full"] }
+syn = { version = "2.0.38", features = ["visit", "extra-traits", "full"] }
 quote = "1.0"
 
 [[bench]]