diff --git a/README.md b/README.md
index 6c68867c..0542605e 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ Make sure you have setup Rust environment (>= 1.64).
   - Submit any transaction to produce a new block in the in parallel reality
   - (Optional) Pre-define/override storage using option `--import-storage=storage.[json/yaml]`. See example storage below.
 
-  ```json
+  ```json5
   // prettier-ignore
   {
     "Sudo": {
diff --git a/karura-rococo.yml b/karura-rococo.yml
index 12c7f723..413230b7 100644
--- a/karura-rococo.yml
+++ b/karura-rococo.yml
@@ -2,3 +2,7 @@ endpoint: wss://karura-rococo-rpc.aca-staging.network/ws
 mock-signature-host: true
 block: 1238000
 db: ./db.sqlite
+
+import-storage:
+  Sudo:
+    Key: 5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY # Alice
diff --git a/src/index.ts b/src/index.ts
index f956af69..3820ef99 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -59,8 +59,7 @@ const setup = async (argv: any) => {
 
   tasks.updateListeningPort(listeningPort)
 
-  const storagePath = argv['import-storage']
-  storagePath && (await importStorage(storagePath, chain))
+  await importStorage(argv['import-storage'], chain)
 
   return context
 }
@@ -107,7 +106,7 @@ const configSchema = z
     block: z.union([z.string(), z.number()]).optional(),
     'executor-cmd': z.string().optional(),
     'build-block-mode': z.nativeEnum(BuildBlockMode).optional(),
-    'import-storage': z.string().optional(),
+    'import-storage': z.any().optional(),
     'mock-signature-host': z.boolean().optional(),
     db: z.string().optional(),
   })
diff --git a/src/rpc/substrate/system.ts b/src/rpc/substrate/system.ts
index 187787b9..e3d46e25 100644
--- a/src/rpc/substrate/system.ts
+++ b/src/rpc/substrate/system.ts
@@ -13,6 +13,9 @@ const handlers: Handlers = {
   system_version: async (_context) => {
     return 'chopsticks-1.1.0'
   },
+  system_chainType: async (_context) => {
+    return 'Development'
+  },
   system_health: async () => {
     return {
       peers: 0,
diff --git a/src/utils/import-storage.ts b/src/utils/import-storage.ts
index 0ffd9e9f..46cc1dc1 100644
--- a/src/utils/import-storage.ts
+++ b/src/utils/import-storage.ts
@@ -5,9 +5,17 @@ import { Blockchain } from '../blockchain'
 import { defaultLogger } from '../logger'
 import { setStorage } from './set-storage'
 
-export const importStorage = async (storagePath: string, chain: Blockchain) => {
-  if (!existsSync(storagePath)) throw Error(`File ${storagePath} does not exist`)
-  const storage: any = yaml.load(String(readFileSync(storagePath)))
-  const blockHash = await setStorage(chain, storage)
+export const importStorage = async (storage: any, chain: Blockchain) => {
+  let storageValue
+  if (storage == null) {
+    return
+  }
+  if (typeof storage === 'string') {
+    if (!existsSync(storage)) throw Error(`File ${storage} does not exist`)
+    storageValue = yaml.load(String(readFileSync(storage)))
+  } else {
+    storageValue = storage
+  }
+  const blockHash = await setStorage(chain, storageValue)
   defaultLogger.trace({ blockHash, storage }, 'ImportStorage')
 }