diff --git a/lodash/lodash-tests.ts b/lodash/lodash-tests.ts
index 8ffb263ef..fe5a8a057 100644
--- a/lodash/lodash-tests.ts
+++ b/lodash/lodash-tests.ts
@@ -1242,6 +1242,12 @@ result = <boolean>_(undefined).isNaN();
 result = <boolean>_.isNative(Array.prototype.push);
 result = <boolean>_(Array.prototype.push).isNative();
 
+// _.isNumber
+result = <boolean>_.isNumber(any);
+result = <boolean>_(1).isNumber();
+result = <boolean>_<any>([]).isNumber();
+result = <boolean>_({}).isNumber();
+
 // _.isRegExp
 result = <boolean>_.isRegExp(any);
 result = <boolean>_(1).isRegExp();
@@ -1479,8 +1485,6 @@ result = <boolean>_.isFunction(_);
 result = <boolean>_.isNull(null);
 result = <boolean>_.isNull(undefined);
 
-result = <boolean>_.isNumber(8.4 * 5);
-
 result = <boolean>_.isObject({});
 result = <boolean>_.isObject([1, 2, 3]);
 result = <boolean>_.isObject(1);
diff --git a/lodash/lodash.d.ts b/lodash/lodash.d.ts
index 2ba77aefb..cf5717666 100644
--- a/lodash/lodash.d.ts
+++ b/lodash/lodash.d.ts
@@ -6294,6 +6294,24 @@ declare module _ {
         isNative(): boolean;
     }
 
+    //_.isNumber
+    interface LoDashStatic {
+        /**
+         * Checks if value is classified as a Number primitive or object.
+         * Note: To exclude Infinity, -Infinity, and NaN, which are classified as numbers, use the _.isFinite method.
+         * @param value The value to check.
+         * @return Returns true if value is correctly classified, else false.
+         */
+        isNumber(value?: any): boolean;
+    }
+
+    interface LoDashWrapperBase<T, TWrapper> {
+        /**
+         * see _.isNumber
+         */
+        isNumber(): boolean;
+    }
+
     //_.isRegExp
     interface LoDashStatic {
         /**
@@ -7117,18 +7135,6 @@ declare module _ {
         isNull(value?: any): boolean;
     }
 
-    //_.isNumber
-    interface LoDashStatic {
-        /**
-        * Checks if value is a number.
-        *
-        * Note: NaN is considered a number. See http://es5.github.io/#x8.5.
-        * @param value The value to check.
-        * @return True if the value is a number, else false.
-        **/
-        isNumber(value?: any): boolean;
-    }
-
     //_.isObject
     interface LoDashStatic {
         /**