diff --git a/core/client/src/light/call_executor.rs b/core/client/src/light/call_executor.rs
index 1e50d3398ecf7..b073529024830 100644
--- a/core/client/src/light/call_executor.rs
+++ b/core/client/src/light/call_executor.rs
@@ -133,7 +133,7 @@ where
 	}
 
 	fn runtime_version(&self, id: &BlockId<Block>) -> ClientResult<RuntimeVersion> {
-		let call_result = self.call(id, "version", &[], ExecutionStrategy::NativeElseWasm, NeverOffchainExt::new())?;
+		let call_result = self.call(id, "Core_version", &[], ExecutionStrategy::NativeElseWasm, NeverOffchainExt::new())?;
 		RuntimeVersion::decode(&mut call_result.as_slice())
 			.ok_or_else(|| ClientErrorKind::VersionInvalid.into())
 	}
diff --git a/core/consensus/common/src/import_queue.rs b/core/consensus/common/src/import_queue.rs
index d1c5c69d02311..4b4fdb5b592c3 100644
--- a/core/consensus/common/src/import_queue.rs
+++ b/core/consensus/common/src/import_queue.rs
@@ -417,7 +417,7 @@ impl<B: BlockT, V: 'static + Verifier<B>> BlockImportWorker<B, V> {
 		verifier: Arc<V>,
 		block_import: SharedBlockImport<B>,
 	) -> Sender<BlockImportWorkerMsg<B>> {
-		let (sender, port) = channel::bounded(4);
+		let (sender, port) = channel::unbounded();
 		let _ = thread::Builder::new()
 			.name("ImportQueueWorker".into())
 			.spawn(move || {