diff --git a/packages/utils/src/type-checks.ts b/packages/utils/src/type-checks.ts
index ed9ec2eea..3d42997ca 100644
--- a/packages/utils/src/type-checks.ts
+++ b/packages/utils/src/type-checks.ts
@@ -21,6 +21,7 @@ const supportedTypes = [
     "bigint",
     "stringified-bigint",
     "hexadecimal",
+    "bignumber",
     "bignumberish"
 ] as const
 
@@ -185,6 +186,8 @@ export function isType(value: any, type: SupportedType): boolean {
             return isStringifiedBigInt(value)
         case "hexadecimal":
             return isHexadecimal(value)
+        case "bignumber":
+            return isBigNumber(value)
         case "bignumberish":
             return isBigNumberish(value)
         default:
diff --git a/packages/utils/tests/type-checks.test.ts b/packages/utils/tests/type-checks.test.ts
index b8801866e..a4bb6f1c7 100644
--- a/packages/utils/tests/type-checks.test.ts
+++ b/packages/utils/tests/type-checks.test.ts
@@ -129,6 +129,9 @@ describe("# type-checks", () => {
         expect(isType(BigInt(1), "bigint")).toBeTruthy()
         expect(isType("1242342342342342", "stringified-bigint")).toBeTruthy()
         expect(isType("0x12", "hexadecimal")).toBeTruthy()
+        expect(isType(BigInt(1), "bignumber")).toBeTruthy()
+        expect(isType("123", "bignumber")).toBeTruthy()
+        expect(isType("0xa123", "bignumber")).toBeTruthy()
         expect(isType(1, "bignumberish")).toBeTruthy()
     })
 
@@ -143,6 +146,8 @@ describe("# type-checks", () => {
         expect(isType(1, "bigint")).toBeFalsy()
         expect(isType(1, "stringified-bigint")).toBeFalsy()
         expect(isType(1, "hexadecimal")).toBeFalsy()
+        expect(isType(1, "bignumber")).toBeFalsy()
+        expect(isType("string", "bignumber")).toBeFalsy()
         expect(isType("string", "bignumberish")).toBeFalsy()
         expect(isType(1, "type" as any)).toBeFalsy()
     })