diff --git a/src/object/assign.js b/src/object/assign.js
index 885b3fef..b41b0ce8 100644
--- a/src/object/assign.js
+++ b/src/object/assign.js
@@ -2,9 +2,8 @@ import _assign from 'lodash/assign'
 import { convert } from 'util/convert'
 
 /**
- * Assigns own enumerable string keyed properties of source objects to the
- * destination object. Source objects are applied from left to right.
- * Subsequent sources overwrite property assignments of previous sources.
+ * Replaces by an object assigning own enumerable string keyed properties of source objects to the destination object.<br />
+ * Source objects are applied from left to right. Subsequent sources overwrite property assignments of previous sources.
  * @function
  * @memberof object
  * @param {Object} object The object to modify.
diff --git a/src/object/defaults.js b/src/object/defaults.js
new file mode 100644
index 00000000..7b77cc66
--- /dev/null
+++ b/src/object/defaults.js
@@ -0,0 +1,18 @@
+import _defaults from 'lodash/defaults'
+import { convert } from 'util/convert'
+
+/**
+ * Replaces by an object assigning own and inherited enumerable string keyed properties of source objects to the destination object for all destination properties that resolve to <code>undefined</code>.<br >
+ * Source objects are applied from left to right. Once a property is set, additional values of the same property are ignored.
+ * @function
+ * @memberof object
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to set.
+ * @param {...Object} [sources] The source objects.
+ * @return {Object} Returns the updated object.
+ * @example defaults({ nested: { a: 1, b: 2 } }, 'nested', { b: 3, c: 4 }) // => { nested: { a:1, b: 2, c: 4 } }
+ * @see {@link https://lodash.com/docs#defaults|lodash.defaults} for more information.
+ * @since 0.3.0
+ */
+const defaults = convert(_defaults)
+export { defaults, defaults as default }
diff --git a/src/object/defaults.spec.js b/src/object/defaults.spec.js
new file mode 100644
index 00000000..e7b9260a
--- /dev/null
+++ b/src/object/defaults.spec.js
@@ -0,0 +1,34 @@
+/* eslint-env jest */
+import { defaults } from './defaults'
+import { immutaTest } from 'test.utils'
+
+describe('Defaults', () => {
+
+  it('should assign default properties objects', () => {
+    immutaTest((input, path) => {
+      const output = defaults(input, path, {
+        b: 3,
+        c: 4,
+      })
+      expect(output).toEqual({
+        nested: {
+          prop: {
+            a: 1,
+            b: 2,
+            c: 4,
+          },
+        },
+        other: {},
+      })
+      return output
+    }, {
+      nested: {
+        prop: {
+          a: 1,
+          b: 2,
+        },
+      },
+      other: {},
+    }, 'nested.prop')
+  })
+})
diff --git a/src/object/index.js b/src/object/index.js
index 7b283151..a38d4e30 100644
--- a/src/object/index.js
+++ b/src/object/index.js
@@ -1,18 +1,30 @@
 import { assign } from './assign'
+import { defaults } from './defaults'
+import { mapKeys } from './mapKeys'
 import { mapValues } from './mapValues'
+import { merge } from './merge'
+import { omit } from './omit'
+import { omitBy } from './omitBy'
+import { pick } from './pick'
 import { pickBy } from './pickBy'
 import { set } from './set'
 import { unset } from './unset'
 import { update } from './update'
 
 /**
- * Array functions.
+ * Object functions.
  * @namespace object
  * @since 0.1.12
  */
 export {
   assign,
+  defaults,
+  mapKeys,
   mapValues,
+  merge,
+  omit,
+  omitBy,
+  pick,
   pickBy,
   set,
   unset,
diff --git a/src/object/mapKeys.js b/src/object/mapKeys.js
new file mode 100644
index 00000000..b27bd5da
--- /dev/null
+++ b/src/object/mapKeys.js
@@ -0,0 +1,18 @@
+import _mapKeys from 'lodash/mapKeys'
+import { convert } from 'util/convert'
+
+/**
+ * Replaces by an object with the same values as the former object and values generated by running each own enumerable string keyed property of the former object thru <code>iteratee</code>.
+ * The iteratee is invoked with three arguments: (value, key, object).
+ * @function
+ * @memberof object
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to set.
+ * @param {function} [iteratee={@link https://lodash.com/docs#identity|lodash.identity}] The function invoked per iteration.
+ * @return {Object} Returns the updated object.
+ * @example mapKeys({ nested: { a: 1, b: 2, c: 3 } }, 'nested', (v, k) => '_' + k) // => { nested: { _a: 1, _b: 2, _c: 3 } }
+ * @see {@link https://lodash.com/docs#mapKeys|lodash.mapKeys} for more information.
+ * @since 0.3.0
+ */
+const mapKeys = convert(_mapKeys)
+export { mapKeys, mapKeys as default }
diff --git a/src/object/mapKeys.spec.js b/src/object/mapKeys.spec.js
new file mode 100644
index 00000000..e22d037b
--- /dev/null
+++ b/src/object/mapKeys.spec.js
@@ -0,0 +1,31 @@
+/* eslint-env jest */
+import { immutaTest } from 'test.utils'
+import { mapKeys } from './mapKeys'
+
+describe('MapKeys', () => {
+  it('should replace the keys of object', () => {
+    immutaTest((input, path) => {
+      const output = mapKeys(input, path, (_, k) => `_${k}`)
+      expect(output).toEqual({
+        nested: {
+          prop: {
+            _a: 1,
+            _b: 2,
+            _c: 3,
+          },
+        },
+        other: {},
+      })
+      return output
+    }, {
+      nested: {
+        prop: {
+          a: 1,
+          b: 2,
+          c: 3,
+        },
+      },
+      other: {},
+    }, 'nested.prop')
+  })
+})
diff --git a/src/object/mapValues.js b/src/object/mapValues.js
index 8fa7c712..818126bd 100644
--- a/src/object/mapValues.js
+++ b/src/object/mapValues.js
@@ -2,8 +2,7 @@ import _mapValues from 'lodash/mapValues'
 import { convert } from 'util/convert'
 
 /**
- * Creates an object with the same keys as object and values generated by
- * running each own enumerable string keyed property of object thru iteratee.
+ * Replaces by an object with the same keys as the former object and values generated by running each own enumerable string keyed property of object thru <code>iteratee</code>.
  * The iteratee is invoked with three arguments: (value, key, object).
  * @function
  * @memberof object
@@ -11,11 +10,9 @@ import { convert } from 'util/convert'
  * @param {Array|string} path The path of the property to set.
  * @param {function} [iteratee={@link https://lodash.com/docs#identity|lodash.identity}] The function invoked per iteration.
  * @return {Object} Returns the updated object.
- * @example mapValues({ nested: { a: 1, b: 2, c: 3 } }, 'nested', v => v * v) // => { nested: { a:1, b: 4, c: 9 } }
- * @example mapValues({ nested: { a: { age: 40, name: 'John' }, b: { age: 30, name: 'Alice' } } }, 'nested', 'age')
- * // => { nested: { a: 40, b: 30 } }
+ * @example mapValues({ nested: { a: 1, b: 2, c: 3 } }, 'nested', v => v * v) // => { nested: { a: 1, b: 4, c: 9 } }
+ * @example mapValues({ nested: { a: { age: 40, name: 'John' }, b: { age: 30, name: 'Alice' } } }, 'nested', 'age') // => { nested: { a: 40, b: 30 } }
  * @see {@link https://lodash.com/docs#mapValues|lodash.mapValues} for more information.
- * @see {@link https://lodash.com/docs#identity|lodash.identity} for more information.
  * @since 0.1.12
  */
 const mapValues = convert(_mapValues)
diff --git a/src/object/merge.js b/src/object/merge.js
new file mode 100644
index 00000000..82a4dc56
--- /dev/null
+++ b/src/object/merge.js
@@ -0,0 +1,18 @@
+import _merge from 'lodash/fp/merge'
+import { convertLodashFp } from 'util/convert'
+
+/**
+ * Replaces by an object deeply merging own enumerable string keyed properties of source objects to the former object.<br />
+ * Source objects are applied from left to right. Subsequent sources overwrite properties of previous sources.
+ * @function
+ * @memberof object
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to set.
+ * @param {...Object} [sources] The source objects.
+ * @return {Object} Returns the updated object.
+ * @example merge({ nested: { prop: { a: 1 } } }, 'nested', { prop: { a: 2, b: 3 } }) // => { nested: { prop: { a: 2, b: 3 } } }
+ * @see {@link https://lodash.com/docs#merge|lodash.merge} for more information.
+ * @since 0.3.0
+ */
+const merge = convertLodashFp(_merge)
+export { merge, merge as default }
diff --git a/src/object/merge.spec.js b/src/object/merge.spec.js
new file mode 100644
index 00000000..d897ee11
--- /dev/null
+++ b/src/object/merge.spec.js
@@ -0,0 +1,30 @@
+/* eslint-env jest */
+import { immutaTest } from 'test.utils'
+import { merge } from './merge'
+
+describe('Merge', () => {
+
+  it('should merge objects', () => {
+    immutaTest((input, path) => {
+      const output = merge(input, path, {
+        prop: {
+          a: 2,
+          b: 3,
+        },
+      })
+      expect(output).toEqual({
+        nested: {
+          prop: {
+            a: 2,
+            b: 3,
+          },
+        },
+        other: {},
+      })
+      return output
+    }, {
+      nested: { prop: { a: 1 } },
+      other: {},
+    }, 'nested')
+  })
+})
diff --git a/src/object/omit.js b/src/object/omit.js
new file mode 100644
index 00000000..5be1a112
--- /dev/null
+++ b/src/object/omit.js
@@ -0,0 +1,17 @@
+import _omit from 'lodash/omit'
+import { convert } from 'util/convert'
+
+/**
+ * Replaces by an object omitting specified properties.
+ * @function
+ * @memberof object
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to set.
+ * @param {...(string|string[])} [paths] The property paths to omit.
+ * @return {Object} Returns the updated object.
+ * @example omit({ nested: { a: 1, b: 2, c: 3 } }, 'nested', 'b') // => { nested: { a:1, c: 3 } }
+ * @see {@link https://lodash.com/docs#omit|lodash.omit} for more information.
+ * @since 0.3.0
+ */
+const omit = convert(_omit)
+export { omit, omit as default }
diff --git a/src/object/omit.spec.js b/src/object/omit.spec.js
new file mode 100644
index 00000000..55b6737d
--- /dev/null
+++ b/src/object/omit.spec.js
@@ -0,0 +1,31 @@
+/* eslint-env jest */
+import { immutaTest } from 'test.utils'
+import { omit } from './omit'
+
+describe('Omit', () => {
+
+  it('should omit properties of object', () => {
+    immutaTest((input, path) => {
+      const output = omit(input, path, 'b')
+      expect(output).toEqual({
+        nested: {
+          prop: {
+            a: 1,
+            c: 3,
+          },
+        },
+        other: {},
+      })
+      return output
+    }, {
+      nested: {
+        prop: {
+          a: 1,
+          b: 2,
+          c: 3,
+        },
+      },
+      other: {},
+    }, 'nested.prop')
+  })
+})
diff --git a/src/object/omitBy.js b/src/object/omitBy.js
new file mode 100644
index 00000000..c8e046ec
--- /dev/null
+++ b/src/object/omitBy.js
@@ -0,0 +1,17 @@
+import _omitBy from 'lodash/omitBy'
+import { convert } from 'util/convert'
+
+/**
+ * Replaces by an object omitting properties that <code>predicate</code> doesn't return truthy for.
+ * @function
+ * @memberof object
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to set.
+ * @param {function} [predicate={@link https://lodash.com/docs#identity|lodash.identity}] The function invoked per property.
+ * @return {Object} Returns the updated object.
+ * @example omitBy({ nested: { a: 1, b: 2, c: 3 } }, 'nested', v => v === 2) // => { nested: { a:1, c: 3 } }
+ * @see {@link https://lodash.com/docs#omitBy|lodash.omitBy} for more information.
+ * @since 0.3.0
+ */
+const omitBy = convert(_omitBy)
+export { omitBy, omitBy as default }
diff --git a/src/object/omitBy.spec.js b/src/object/omitBy.spec.js
new file mode 100644
index 00000000..a10378c1
--- /dev/null
+++ b/src/object/omitBy.spec.js
@@ -0,0 +1,31 @@
+/* eslint-env jest */
+import { immutaTest } from 'test.utils'
+import { omitBy } from './omitBy'
+
+describe('OmitBy', () => {
+
+  it('should omit properties matching predicate', () => {
+    immutaTest((input, path) => {
+      const output = omitBy(input, path, v => v === 2)
+      expect(output).toEqual({
+        nested: {
+          prop: {
+            a: 1,
+            c: 3,
+          },
+        },
+        other: {},
+      })
+      return output
+    }, {
+      nested: {
+        prop: {
+          a: 1,
+          b: 2,
+          c: 3,
+        },
+      },
+      other: {},
+    }, 'nested.prop')
+  })
+})
diff --git a/src/object/pick.js b/src/object/pick.js
new file mode 100644
index 00000000..d1001e24
--- /dev/null
+++ b/src/object/pick.js
@@ -0,0 +1,17 @@
+import _pick from 'lodash/pick'
+import { convert } from 'util/convert'
+
+/**
+ * Replaces by an object picking specified properties.
+ * @function
+ * @memberof object
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to set.
+ * @param {...(string|string[])} [paths] The property paths to pick.
+ * @return {Object} Returns the updated object.
+ * @example pick({ nested: { a: 1, b: 2, c: 3 } }, 'nested', 'b') // => { nested: { b: 2 } }
+ * @see {@link https://lodash.com/docs#pick|lodash.pick} for more information.
+ * @since 0.3.0
+ */
+const pick = convert(_pick)
+export { pick, pick as default }
diff --git a/src/object/pick.spec.js b/src/object/pick.spec.js
new file mode 100644
index 00000000..43ac3a41
--- /dev/null
+++ b/src/object/pick.spec.js
@@ -0,0 +1,26 @@
+/* eslint-env jest */
+import { immutaTest } from 'test.utils'
+import { pick } from './pick'
+
+describe('Pick', () => {
+
+  it('should pick properties of object', () => {
+    immutaTest((input, path) => {
+      const output = pick(input, path, 'b')
+      expect(output).toEqual({
+        nested: { prop: { b: 2 } },
+        other: {},
+      })
+      return output
+    }, {
+      nested: {
+        prop: {
+          a: 1,
+          b: 2,
+          c: 3,
+        },
+      },
+      other: {},
+    }, 'nested.prop')
+  })
+})
diff --git a/src/object/pickBy.js b/src/object/pickBy.js
index 387e957e..23204ae8 100644
--- a/src/object/pickBy.js
+++ b/src/object/pickBy.js
@@ -2,8 +2,7 @@ import _pickBy from 'lodash/pickBy'
 import { convert } from 'util/convert'
 
 /**
- * Creates an object composed of the object properties predicate returns truthy
- * for. The predicate is invoked with two arguments: (value, key).
+ * Replaces by an object picking properties that <code>predicate</code> returns truthy for.
  * @function
  * @memberof object
  * @param {Object} object The object to modify.
@@ -12,7 +11,6 @@ import { convert } from 'util/convert'
  * @return {Object} Returns the updated object.
  * @example pickBy({ nested: { a: 1, b: 2, c: 3, d: 4 } }, 'nested', v => v < 3) // => { nested: { a: 1, b: 2 } }
  * @see {@link https://lodash.com/docs#pickBy|lodash.pickBy} for more information.
- * @see {@link https://lodash.com/docs#identity|lodash.identity} for more information.
  * @since 0.1.12
  */
 const pickBy = convert(_pickBy)
diff --git a/src/util/convert.js b/src/util/convert.js
index 3611f97b..44d6e3a8 100644
--- a/src/util/convert.js
+++ b/src/util/convert.js
@@ -29,7 +29,6 @@ export { convert, convert as default }
  * @return {function} Returns the wrapped function.
  * @see {@link util.convert|convert} for more information.
  * @since 0.2.0
- * @deprecated Unused since 0.3.0 and {@link fix #72|https://github.com/Zenika/immutadot/issues/72}, to be removed ?
  * @private
  */
 export const convertLodashFp = fn => convert(lodashFpConvert(fn))