diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0f60f6a4e6..9a92c3c3b2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ Changes:
 - Only explicitly support LSB on `BitVec` types
 - Change `toHuman` on `BitVec` to output default LSB
 - Add `bytes{Sent, Recv}` to provider stats
+- Add support for `dev_getBlockStats` RPC
 
 
 ## 7.13.1 Mar 19, 2022
diff --git a/packages/types/src/interfaces/definitions.ts b/packages/types/src/interfaces/definitions.ts
index a64daa610f..51e6b7608c 100644
--- a/packages/types/src/interfaces/definitions.ts
+++ b/packages/types/src/interfaces/definitions.ts
@@ -14,6 +14,7 @@ export { default as collective } from './collective/definitions';
 export { default as consensus } from './consensus/definitions';
 export { default as contracts } from './contracts/definitions';
 export { default as democracy } from './democracy/definitions';
+export { default as dev } from './dev/definitions';
 export { default as elections } from './elections/definitions';
 export { default as engine } from './engine/definitions';
 export { default as evm } from './evm/definitions';
diff --git a/packages/types/src/interfaces/dev/definitions.ts b/packages/types/src/interfaces/dev/definitions.ts
new file mode 100644
index 0000000000..a41c71d6f3
--- /dev/null
+++ b/packages/types/src/interfaces/dev/definitions.ts
@@ -0,0 +1,31 @@
+// Copyright 2017-2022 @polkadot/types authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+// order important in structs... :)
+/* eslint-disable sort-keys */
+
+import type { Definitions } from '../../types';
+
+export default {
+  rpc: {
+    getBlockStats: {
+      description: 'Reexecute the specified `block_hash` and gather statistics while doing so',
+      params: [
+        {
+          name: 'at',
+          type: 'Hash',
+          isHistoric: true
+        }
+      ],
+      type: 'Option<BlockStats>'
+    }
+  },
+  types: {
+    BlockStats: {
+      witnessLen: 'u64',
+      witnessCompactLen: 'u64',
+      blockLen: 'u64',
+      blockNumExtrinsics: 'u64'
+    }
+  }
+} as Definitions;