diff --git a/package.json b/package.json
index 413890f04..0fccbcc3f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@interlay/interbtc-api",
-  "version": "2.0.2",
+  "version": "2.0.3",
   "description": "JavaScript library to interact with interBTC",
   "main": "build/src/index.js",
   "typings": "build/src/index.d.ts",
@@ -55,7 +55,7 @@
     "@interlay/esplora-btc-api": "0.4.0",
     "@interlay/interbtc-types": "1.12.0",
     "@interlay/monetary-js": "0.7.2",
-    "@polkadot/api": "9.11.1",
+    "@polkadot/api": "9.14.2",
     "big.js": "6.1.1",
     "bitcoin-core": "^3.0.0",
     "bitcoinjs-lib": "^5.2.0",
@@ -65,7 +65,7 @@
     "regtest-client": "^0.2.0"
   },
   "devDependencies": {
-    "@polkadot/typegen": "9.11.1",
+    "@polkadot/typegen": "9.14.2",
     "@types/big.js": "6.1.2",
     "@types/chai": "^4.2.12",
     "@types/chai-as-promised": "^7.1.3",
diff --git a/src/parachain/constants.ts b/src/parachain/constants.ts
index 74b758a9b..27d13f02a 100644
--- a/src/parachain/constants.ts
+++ b/src/parachain/constants.ts
@@ -1,5 +1,6 @@
-import { BlockNumber, Moment, RuntimeDbWeight } from "@polkadot/types/interfaces/runtime";
+import { BlockNumber, Moment } from "@polkadot/types/interfaces/runtime";
 import { ApiPromise } from "@polkadot/api";
+import { SpWeightsRuntimeDbWeight } from "@polkadot/types/lookup";
 
 /**
  * @category BTC Bridge
@@ -14,7 +15,7 @@ export interface ConstantsAPI {
     /**
      * @returns The weight of database operations that the runtime can invoke.
      */
-    getSystemDbWeight(): RuntimeDbWeight;
+    getSystemDbWeight(): SpWeightsRuntimeDbWeight;
     /**
      * @returns The minimum period between blocks. Beware that this is different to the *expected* period
      * that the block production apparatus provides. Your chosen consensus system will generally
@@ -31,7 +32,7 @@ export class DefaultConstantsAPI implements ConstantsAPI {
         return this.api.consts.system.blockHashCount;
     }
 
-    getSystemDbWeight(): RuntimeDbWeight {
+    getSystemDbWeight(): SpWeightsRuntimeDbWeight {
         return this.api.consts.system.dbWeight;
     }