diff --git a/xtask/src/mainnet_spec.rs b/xtask/src/mainnet_spec.rs
index aba97513..244746ef 100644
--- a/xtask/src/mainnet_spec.rs
+++ b/xtask/src/mainnet_spec.rs
@@ -94,10 +94,9 @@ type OpaqueBlock = Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>;
 // }
 
 async fn create_mainnet_spec() -> Box<dyn ChainSpec> {
-    let mut chain_spec = sc_service::GenericChainSpec::<Option<()>>::from_json_bytes(
-        include_bytes!("../../node/chain-specs/main.json"),
-    )
-    .unwrap();
+    let mut chain_spec =
+        sc_service::ChainSpec::from_json_bytes(include_bytes!("../../node/chain-specs/main.json"))
+            .unwrap();
 
     let api = "wss://api.communeai.net".to_string();