diff --git a/index.js b/index.js
index 9a0fe70..4983233 100644
--- a/index.js
+++ b/index.js
@@ -1562,7 +1562,7 @@ if (typeof BigInt === "function") {
 
   // Override
   Long.fromValue = function fromValueWithBigInt(value, unsigned) {
-    if (typeof value === "bigint") return fromBigInt(value, unsigned);
+    if (typeof value === "bigint") return Long.fromBigInt(value, unsigned);
     return fromValue(value, unsigned);
   };
 
diff --git a/package-lock.json b/package-lock.json
index a1fd88b..6b350a3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.0.0",
       "license": "Apache-2.0",
       "devDependencies": {
-        "esm2umd": "^0.3.0",
+        "esm2umd": "^0.3.1",
         "prettier": "^3.5.0",
         "typescript": "^5.7.3"
       }
@@ -426,9 +426,9 @@
       }
     },
     "node_modules/esm2umd": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/esm2umd/-/esm2umd-0.3.0.tgz",
-      "integrity": "sha512-dHcmK+4D2thL27HUz8UazgPqIIJARj+whPF/Wr5zraqlCe54UpPIFsg1wKRJEZK/BCmq6jPMqTtYBTXHz9j01A==",
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/esm2umd/-/esm2umd-0.3.1.tgz",
+      "integrity": "sha512-5WcGtkITdTHoLSkM/ZGWgsieCvlPUJLJdGOAmnmXPjjNBU/lwMGg3D4Tx/FWe32pY0ZhhAwoM8Oy+1hBI7BKQg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -871,9 +871,9 @@
       "dev": true
     },
     "esm2umd": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/esm2umd/-/esm2umd-0.3.0.tgz",
-      "integrity": "sha512-dHcmK+4D2thL27HUz8UazgPqIIJARj+whPF/Wr5zraqlCe54UpPIFsg1wKRJEZK/BCmq6jPMqTtYBTXHz9j01A==",
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/esm2umd/-/esm2umd-0.3.1.tgz",
+      "integrity": "sha512-5WcGtkITdTHoLSkM/ZGWgsieCvlPUJLJdGOAmnmXPjjNBU/lwMGg3D4Tx/FWe32pY0ZhhAwoM8Oy+1hBI7BKQg==",
       "dev": true,
       "requires": {
         "@babel/core": "^7.26.8",
diff --git a/package.json b/package.json
index b09677b..1b8bee1 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "README.md"
   ],
   "devDependencies": {
-    "esm2umd": "^0.3.0",
+    "esm2umd": "^0.3.1",
     "prettier": "^3.5.0",
     "typescript": "^5.7.3"
   }
diff --git a/tests/index.js b/tests/index.js
index 56ba76c..3eab85e 100644
--- a/tests/index.js
+++ b/tests/index.js
@@ -267,6 +267,15 @@ var tests = [
       assert.strictEqual(unsignedFromUnsigned.toBigInt(), values[i].unsigned);
       var signedFromUnsigned = Long.fromBigInt(values[i].unsigned);
       assert.strictEqual(signedFromUnsigned.toBigInt(), values[i].signed);
+
+      var signedFromSigned = Long.fromValue(values[i].signed);
+      assert.strictEqual(signedFromSigned.toBigInt(), values[i].signed);
+      var unsignedFromSigned = Long.fromValue(values[i].signed, true);
+      assert.strictEqual(unsignedFromSigned.toBigInt(), values[i].unsigned);
+      var unsignedFromUnsigned = Long.fromValue(values[i].unsigned, true);
+      assert.strictEqual(unsignedFromUnsigned.toBigInt(), values[i].unsigned);
+      var signedFromUnsigned = Long.fromValue(values[i].unsigned);
+      assert.strictEqual(signedFromUnsigned.toBigInt(), values[i].signed);
     }
   },