diff --git a/packages/app-util/package.json b/packages/app-util/package.json
index 07aa53d0..227ce23a 100644
--- a/packages/app-util/package.json
+++ b/packages/app-util/package.json
@@ -12,6 +12,6 @@
   "repository": "https://github.com/AcalaNetwork/acala.js.git",
   "dependencies": {
     "@babel/runtime": "^7.10.2",
-    "bignumber.js": "^9.0.0"
+    "bignumber.js": "^9.1.1"
   }
 }
diff --git a/packages/sdk-core/package.json b/packages/sdk-core/package.json
index f92f5ad9..dd539ff8 100644
--- a/packages/sdk-core/package.json
+++ b/packages/sdk-core/package.json
@@ -18,7 +18,7 @@
     "@polkadot/api": "^9.9.1",
     "@polkadot/types": "^9.9.1",
     "@types/events": "^3.0.0",
-    "bignumber.js": "^9.0.0",
+    "bignumber.js": "^9.1.1",
     "events": "^3.2.0",
     "lodash": "^4.17.20"
   },
diff --git a/packages/sdk/package.json b/packages/sdk/package.json
index bee832d4..ea020a6f 100644
--- a/packages/sdk/package.json
+++ b/packages/sdk/package.json
@@ -26,7 +26,7 @@
     "@polkadot/types": "^9.9.1",
     "@types/events": "^3.0.0",
     "axios": "^0.24.0",
-    "bignumber.js": "^9.0.0",
+    "bignumber.js": "^9.1.1",
     "cross-fetch": "^3.1.4",
     "ethers": "^5.6.2",
     "events": "^3.2.0",
diff --git a/yarn.lock b/yarn.lock
index 29ca5167..09f98704 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -66,7 +66,7 @@ __metadata:
   resolution: "@acala-network/app-util@workspace:packages/app-util"
   dependencies:
     "@babel/runtime": ^7.10.2
-    bignumber.js: ^9.0.0
+    bignumber.js: ^9.1.1
   languageName: unknown
   linkType: soft
 
@@ -163,7 +163,7 @@ __metadata:
     "@polkadot/types": ^9.9.1
     "@types/events": ^3.0.0
     "@types/lodash": ^4.14.161
-    bignumber.js: ^9.0.0
+    bignumber.js: ^9.1.1
     events: ^3.2.0
     lodash: ^4.17.20
   languageName: unknown
@@ -243,7 +243,7 @@ __metadata:
     "@types/events": ^3.0.0
     "@types/lodash": ^4.14.161
     axios: ^0.24.0
-    bignumber.js: ^9.0.0
+    bignumber.js: ^9.1.1
     cross-fetch: ^3.1.4
     ethers: ^5.6.2
     events: ^3.2.0
@@ -5445,6 +5445,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"bignumber.js@npm:^9.1.1":
+  version: 9.1.1
+  resolution: "bignumber.js@npm:9.1.1"
+  checksum: ad243b7e2f9120b112d670bb3d674128f0bd2ca1745b0a6c9df0433bd2c0252c43e6315d944c2ac07b4c639e7496b425e46842773cf89c6a2dcd4f31e5c4b11e
+  languageName: node
+  linkType: hard
+
 "binary-extensions@npm:^2.0.0":
   version: 2.2.0
   resolution: "binary-extensions@npm:2.2.0"