diff --git a/postgres-derive/Cargo.toml b/postgres-derive/Cargo.toml
index 22b50b70..8470bc8a 100644
--- a/postgres-derive/Cargo.toml
+++ b/postgres-derive/Cargo.toml
@@ -12,6 +12,6 @@ proc-macro = true
 test = false
 
 [dependencies]
-syn = "1.0"
+syn = "2.0"
 proc-macro2 = "1.0"
 quote = "1.0"