diff --git a/rustbus_derive/Cargo.toml b/rustbus_derive/Cargo.toml
index 951b20c..de5e5f3 100644
--- a/rustbus_derive/Cargo.toml
+++ b/rustbus_derive/Cargo.toml
@@ -13,7 +13,7 @@ homepage = "https://github.com/KillingSpark/rustbus"
 proc-macro = true
 
 [dependencies]
-syn = "1.0"
+syn = "2.0"
 quote = "1.0"
 proc-macro2 = "1.0"
 
diff --git a/rustbus_derive/src/structs.rs b/rustbus_derive/src/structs.rs
index 1d57fb7..813a84e 100644
--- a/rustbus_derive/src/structs.rs
+++ b/rustbus_derive/src/structs.rs
@@ -25,7 +25,7 @@ pub fn make_struct_unmarshal_impl(
 ) -> TokenStream {
     let marshal = struct_field_unmarshal(fields);
 
-    let mut bufdef = syn::LifetimeDef {
+    let mut bufdef = syn::LifetimeParam {
         attrs: Vec::new(),
         lifetime: syn::Lifetime::new("'__internal_buf", proc_macro2::Span::call_site()),
         colon_token: None,
diff --git a/rustbus_derive/src/variants.rs b/rustbus_derive/src/variants.rs
index 0a844ae..5c263d8 100644
--- a/rustbus_derive/src/variants.rs
+++ b/rustbus_derive/src/variants.rs
@@ -160,7 +160,7 @@ pub fn make_variant_unmarshal_impl(
             tokens
         });
 
-    let mut bufdef = syn::LifetimeDef {
+    let mut bufdef = syn::LifetimeParam {
         attrs: Vec::new(),
         lifetime: syn::Lifetime::new("'__internal_buf", proc_macro2::Span::call_site()),
         colon_token: None,