diff --git a/package.json b/package.json
index 870761829..4477d752e 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "asn1.js-rfc5280": "^3.0.0",
     "axios": "^1.5.1",
     "big-integer": "^1.6.43",
-    "bignumber.js": ">=6.0.0",
+    "bignumber.js": "^9.1.2",
     "binascii": "0.0.2",
     "bn.js": "^5.2.1",
     "browser-request": "^0.3.3",