diff --git a/types/dot-prop-immutable/dot-prop-immutable-tests.ts b/types/dot-prop-immutable/dot-prop-immutable-tests.ts
new file mode 100644
index 0000000000..232ec76e35
--- /dev/null
+++ b/types/dot-prop-immutable/dot-prop-immutable-tests.ts
@@ -0,0 +1,16 @@
+import dotProp = require('dot-prop-immutable');
+
+dotProp.get({foo: {bar: 'unicorn'}}, 'foo.bar');  // $ExpectType any
+dotProp.get({foo: {bar: 'a'}}, 'foo.notDefined.deep');  // $ExpectType any
+dotProp.get<string>({foo: {bar: 'a'}}, 'foo.notDefined.deep', 'default value');  // $ExpectType string
+dotProp.get({foo: {'dot.dot': 'unicorn'}}, 'foo.dot\\.dot');  // $ExpectType any
+dotProp.get({foo: {'dot.dot': 'unicorn'}}, ['foo', 'dot.dot']);  // $ExpectType any
+
+dotProp.set<object>({foo: {bar: 'a'}}, 'foo.bar', 'b');  // $ExpectType object
+dotProp.set<object>({foo: {bar: 'b'}} , 'foo.baz', 'x');  // $ExpectType object
+dotProp.set<object>({foo: {bar: 'a'}}, 'foo.bar', (v: string) => v + 'bc');  // $ExpectType object
+
+dotProp.toggle<object>({foo: {bar: true}}, 'foo.bar');  // $ExpectType object
+
+dotProp.merge<object>({foo: {bar: {a: 1, b: 2}}}, 'foo.bar', {c: 3});  // $ExpectType object
+dotProp.merge<object>({foo: {bar: [1, 2]}}, 'foo.bar', [3, 4]);  // $ExpectType object
diff --git a/types/dot-prop-immutable/index.d.ts b/types/dot-prop-immutable/index.d.ts
new file mode 100644
index 0000000000..32e22b8523
--- /dev/null
+++ b/types/dot-prop-immutable/index.d.ts
@@ -0,0 +1,188 @@
+// Type definitions for dot-prop-immutable 1.5
+// Project: https://github.com/debitoor/dot-prop-immutable
+// Definitions by: Paul Brussee <https://github.com/brussee>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.4
+
+export type ArrayOrObject = any[] | object;
+
+export type Path = number | string | Array<number|string>;
+
+/**
+ * Access a nested property by a dot path
+ *
+ * @param object - Object to get the `path` value.
+ * @param path - Path of the property in the object, using `.` to separate each nested key. Use `\\.` if you have a `.` in the key.
+ * @param defaultValue - Default value.
+ * @example
+ * ```
+ * // Getter
+ * dotProp.get({foo: {bar: 'unicorn'}}, 'foo.bar')
+ * //=> 'unicorn'
+ *
+ * dotProp.get({foo: {bar: 'a'}}, 'foo.notDefined.deep')
+ * //=> undefined
+ *
+ * dotProp.get({foo: {bar: 'a'}}, 'foo.notDefined.deep', 'default value')
+ * //=> default value
+ *
+ * dotProp.get({foo: {'dot.dot': 'unicorn'}}, 'foo.dot\\.dot')
+ * //=> 'unicorn'
+ * ```
+ * or use a property array as a path.
+ * ```
+ * // Use an array as get path
+ * dotProp.get({foo: {'dot.dot': 'unicorn'}}, ['foo', 'dot.dot'])
+ * //=> 'unicorn'
+ * ```
+ * It is also possible to index into an array where the special index $end refers to the last element of the array.
+ * ```
+ * var obj = {foo: [{ bar: 'gold-unicorn'}, 'white-unicorn', 'silver-unicorn']};
+ *
+ * // Index into array
+ * dotProp.get(obj, 'foo.1')
+ * //=> 'white-unicorn'
+ *
+ * dotProp.get(obj, 'foo.0.bar')
+ * //=> 'gold-unicorn'
+ *
+ * // Index into array with $end
+ * dotProp.get(obj, 'foo.$end')
+ * //=> 'silver-unicorn'
+ *
+ * // If obj is an array
+ * dotProp.get([{ bar: 'gold-unicorn'}, 'white-unicorn', 'silver-unicorn'], '0.bar')
+ * //=> 'gold-unicorn'
+ * ```
+ */
+export function get(
+    object: ArrayOrObject,
+    path: Path
+): any;
+
+export function get<V>(
+    object: ArrayOrObject,
+    path: Path,
+    defaultValue: V
+): V;
+
+/**
+ * Modify a nested property by a dot path
+ *
+ * @param object - Object to set the `path` value.
+ * @param path - Path of the property in the object, using `.` to separate each nested key. Use `\\.` if you have a `.` in the key.
+ * @param value - Value to set at `path`.
+ * @example
+ * ```
+ * // Setter
+ * var obj = {foo: {bar: 'a'}};
+ *
+ * var obj1 = dotProp.set(obj, 'foo.bar', 'b');
+ * //obj1 => {foo: {bar: 'b'}}
+ *
+ * var obj2 = dotProp.set(obj1 , 'foo.baz', 'x');
+ * //obj2 => {foo: {bar: 'b', baz: 'x'}}
+ * ```
+ * where obj, obj1, obj2, obj3 all are different objects.
+ *
+ * Use a function to modify the selected property, where first argument is the old value.
+ * ```
+ * // Setter where value is a function (get and set current value)
+ * dotProp.set({foo: {bar: 'a'}}, 'foo.bar', v => v + 'bc')
+ * //=> {foo: {bar: 'abc'}}
+ * ```
+ * Modify a nested array
+ * ```
+ * var obj = {foo: [{ bar: 'gold-unicorn'}, 'white-unicorn', 'silver-unicorn']};
+ *
+ * // Index into array
+ * dotProp.set(obj, 'foo.1', 'platin-unicorn')
+ * //=> {foo: [{bar: 'gold-unicorn'}, 'platin-unicorn', 'silver-unicorn']}
+ *
+ * dotProp.set(obj, 'foo.0.bar', 'platin-unicorn')
+ * //=> {foo: [{bar: 'platin-unicorn'}, 'white-unicorn', 'silver-unicorn']}
+ *
+ * // Index into array with $end
+ * dotProp.set(obj, 'foo.$end', 'platin-unicorn')
+ * //=> {foo: [{ bar: 'gold-unicorn'}, 'white-unicorn', 'platin-unicorn']}
+ * ```
+ */
+export function set<T extends ArrayOrObject>(
+    object: T,
+    path: Path,
+    value: any
+): T;
+
+/**
+ * Delete a nested property/array by a dot path
+ *
+ * @param object - Object to delete the `path` value.
+ * @param path - Path of the property in the object, using `.` to separate each nested key. Use `\\.` if you have a `.` in the key.
+ * @example
+ * ```
+ * var obj = {foo: [{ bar: 'gold-unicorn'}, 'white-unicorn', 'silver-unicorn']};
+ *
+ * // delete
+ * dotProp.delete(obj, 'foo.$end');
+ * //=> {foo: [{ bar: 'gold-unicorn'}, 'white-unicorn']}
+ *
+ * dotProp.delete(obj, 'foo.0.bar');
+ * //=> {foo: [{}, 'white-unicorn', 'silver-unicorn']}
+ * ```
+ */
+declare function _delete<T extends ArrayOrObject>(
+    object: T,
+    path: Path
+): T;
+export { _delete as delete };
+
+/**
+ * Toggle a boolean a value by a dot path.
+ *
+ * @param object - Object to toggle the `path` value.
+ * @param path - Path of the property in the object, using `.` to separate each nested key. Use `\\.` if you have a `.` in the key.
+ * @example
+ * ```
+ * var obj = {foo: { bar: true } };
+ *
+ * // toggle
+ * dotProp.toggle(obj, 'foo.bar');
+ * //=> {foo: { bar: false } }
+ * ```
+ */
+export function toggle<T extends ArrayOrObject>(
+    object: T,
+    path: Path
+): T;
+
+/**
+ * Merge a value by a dot path.
+ *
+ * @param object - Object to toggle the `path` value.
+ * @param path - Path of the property in the object, using `.` to separate each nested key. Use `\\.` if you have a `.` in the key.
+ * @param value - Value to set at `path`.
+ * @example
+ * The target value must be an object, array, null, or undefined.
+ * - If target is an object, Object.assign({}, target, param) is used.
+ * - If target an array, target.concat(param) is used.
+ * - If target is null or undefined, the value is simply set.
+ * ```
+ * var obj = {foo: { bar: {a:1, b:2 } };
+ *
+ * // merge object
+ * dotProp.merge(obj, 'foo.bar', {c:3} );
+ * //=> {foo: { bar:{ a:1, b:2, c:3} } }
+ *
+ * var arr = {foo: { bar: [1, 2] } };
+ *
+ * // merge array
+ * dotProp.merge(arr, 'foo.bar', [3, 4] );
+ * //=> {foo: { bar:[1, 2, 3, 4 ] }
+ * };
+ * ```
+ */
+export function merge<T extends ArrayOrObject>(
+    object: T,
+    path: Path,
+    value: ArrayOrObject
+): T;
diff --git a/types/dot-prop-immutable/tsconfig.json b/types/dot-prop-immutable/tsconfig.json
new file mode 100644
index 0000000000..5f529a681a
--- /dev/null
+++ b/types/dot-prop-immutable/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "dot-prop-immutable-tests.ts"
+    ]
+}
diff --git a/types/dot-prop-immutable/tslint.json b/types/dot-prop-immutable/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/dot-prop-immutable/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }