diff --git a/buildsystem/dependencies.gradle b/buildsystem/dependencies.gradle
index c3b23dab..841b0407 100644
--- a/buildsystem/dependencies.gradle
+++ b/buildsystem/dependencies.gradle
@@ -1,6 +1,6 @@
 ext.versions = [
-        kotlin         : '1.2.31',
-        dokka          : '0.9.16',
+        kotlin         : '1.2.51',
+        dokka          : '0.9.17',
         android_gradle : '3.1.1',
         bintray        : '1.7.3',
         maven          : '1.5',
@@ -44,8 +44,8 @@ ext.kakao = [
         artifact        : 'kakao',
         name            : 'kakao',
         description     : 'Kotlin based DSL for fluent AT with Espresso',
-        version         : "1.3.0$alias",
-        version_desc    : "Kakao 1.3.0$alias",
+        version         : "1.4.0$alias",
+        version_desc    : "Kakao 1.4.0$alias",
         site            : 'https://github.com/agoda-com/Kakao',
         github          : 'https://github.com/agoda-com/Kakao.git'
 ]
diff --git a/docs/kakao/alltypes/index.md b/docs/kakao/alltypes/index.md
index c9e71005..27119910 100644
--- a/docs/kakao/alltypes/index.md
+++ b/docs/kakao/alltypes/index.md
@@ -59,7 +59,7 @@
 | [com.agoda.kakao.KViewPager](../com.agoda.kakao/-k-view-pager/index.md) | View with SwipeableActions and ViewPagerAssertions |
 | [com.agoda.kakao.KWebView](../com.agoda.kakao/-k-web-view/index.md) | Class for interacting with WebViews |
 | [com.agoda.kakao.ListViewAdapterAssertions](../com.agoda.kakao/-list-view-adapter-assertions/index.md) | Provides assertions for listView adapter |
-| [com.agoda.kakao.ListViewViewAdapterSizeMatcher](../com.agoda.kakao/-list-view-view-adapter-size-matcher/index.md) | Matches ListView with count of childs |
+| [com.agoda.kakao.ListViewViewAdapterSizeMatcher](../com.agoda.kakao/-list-view-view-adapter-size-matcher/index.md) | Matches ListView with count of children |
 | [com.agoda.kakao.NavigationItemMatcher](../com.agoda.kakao/-navigation-item-matcher/index.md) | Matches NavigationView with given item id checked |
 | [com.agoda.kakao.NavigationViewActions](../com.agoda.kakao/-navigation-view-actions/index.md) | Provides actions for navigation view |
 | [com.agoda.kakao.NavigationViewAssertions](../com.agoda.kakao/-navigation-view-assertions/index.md) | Provides assertions for NavigationView |
@@ -74,7 +74,7 @@
 | [com.agoda.kakao.RatingBarMatcher](../com.agoda.kakao/-rating-bar-matcher/index.md) | Matcher of value rating of given matcher |
 | [com.agoda.kakao.RecyclerActions](../com.agoda.kakao/-recycler-actions/index.md) | Provides ScrollableActions implementation for RecyclerView |
 | [com.agoda.kakao.RecyclerAdapterAssertions](../com.agoda.kakao/-recycler-adapter-assertions/index.md) | Provides assertions for recyclerView adapter |
-| [com.agoda.kakao.RecyclerViewAdapterSizeMatcher](../com.agoda.kakao/-recycler-view-adapter-size-matcher/index.md) | Matches RecyclerView with count of childs |
+| [com.agoda.kakao.RecyclerViewAdapterSizeMatcher](../com.agoda.kakao/-recycler-view-adapter-size-matcher/index.md) | Matches RecyclerView with count of children |
 | [com.agoda.kakao.RootBuilder](../com.agoda.kakao/-root-builder/index.md) | Class for building root matchers |
 | [com.agoda.kakao.Screen](../com.agoda.kakao/-screen/index.md) | Container class for UI elements. |
 | [com.agoda.kakao.ScreenActions](../com.agoda.kakao/-screen-actions/index.md) | Interface with common actions for all screens |
diff --git a/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/-init-.md b/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/-init-.md
index 9731e09f..f45f1182 100644
--- a/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/-init-.md
+++ b/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/-init-.md
@@ -4,8 +4,8 @@
 
 `ListViewViewAdapterSizeMatcher(size: `[`Int`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`
 
-Matches ListView with count of childs
+Matches ListView with count of children
 
 ### Parameters
 
-`size` - of childs count in ListView
\ No newline at end of file
+`size` - of children count in ListView
\ No newline at end of file
diff --git a/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/index.md b/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/index.md
index 9542d565..7ab5e2f2 100644
--- a/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/index.md
+++ b/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/index.md
@@ -4,21 +4,21 @@
 
 `class ListViewViewAdapterSizeMatcher : BoundedMatcher<`[`View`](https://developer.android.com/reference/android/view/View.html)`, `[`ListView`](https://developer.android.com/reference/android/widget/ListView.html)`>`
 
-Matches ListView with count of childs
+Matches ListView with count of children
 
 ### Parameters
 
-`size` - of childs count in ListView
+`size` - of children count in ListView
 
 ### Constructors
 
 | Name | Summary |
 |---|---|
-| [&lt;init&gt;](-init-.md) | `ListViewViewAdapterSizeMatcher(size: `[`Int`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`<br>Matches ListView with count of childs |
+| [&lt;init&gt;](-init-.md) | `ListViewViewAdapterSizeMatcher(size: `[`Int`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`<br>Matches ListView with count of children |
 
 ### Functions
 
 | Name | Summary |
 |---|---|
 | [describeTo](describe-to.md) | `fun describeTo(description: Description): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) |
-| [matchesSafely](matches-safely.md) | `fun matchesSafely(view: `[`ListView`](https://developer.android.com/reference/android/widget/ListView.html)`?): `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) |
+| [matchesSafely](matches-safely.md) | `fun matchesSafely(view: `[`ListView`](https://developer.android.com/reference/android/widget/ListView.html)`): `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) |
diff --git a/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/matches-safely.md b/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/matches-safely.md
index 2a510041..ef3ebd6d 100644
--- a/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/matches-safely.md
+++ b/docs/kakao/com.agoda.kakao/-list-view-view-adapter-size-matcher/matches-safely.md
@@ -2,4 +2,4 @@
 
 # matchesSafely
 
-`protected fun matchesSafely(view: `[`ListView`](https://developer.android.com/reference/android/widget/ListView.html)`?): `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html)
\ No newline at end of file
+`protected fun matchesSafely(view: `[`ListView`](https://developer.android.com/reference/android/widget/ListView.html)`): `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html)
\ No newline at end of file
diff --git a/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/-init-.md b/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/-init-.md
index 309b5bcc..571d3007 100644
--- a/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/-init-.md
+++ b/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/-init-.md
@@ -4,8 +4,8 @@
 
 `RecyclerViewAdapterSizeMatcher(size: `[`Int`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`
 
-Matches RecyclerView with count of childs
+Matches RecyclerView with count of children
 
 ### Parameters
 
-`size` - of childs count in RecyclerView
\ No newline at end of file
+`size` - of children count in RecyclerView
\ No newline at end of file
diff --git a/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/index.md b/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/index.md
index e5f26ab7..efc38999 100644
--- a/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/index.md
+++ b/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/index.md
@@ -4,21 +4,21 @@
 
 `class RecyclerViewAdapterSizeMatcher : BoundedMatcher<`[`View`](https://developer.android.com/reference/android/view/View.html)`, RecyclerView>`
 
-Matches RecyclerView with count of childs
+Matches RecyclerView with count of children
 
 ### Parameters
 
-`size` - of childs count in RecyclerView
+`size` - of children count in RecyclerView
 
 ### Constructors
 
 | Name | Summary |
 |---|---|
-| [&lt;init&gt;](-init-.md) | `RecyclerViewAdapterSizeMatcher(size: `[`Int`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`<br>Matches RecyclerView with count of childs |
+| [&lt;init&gt;](-init-.md) | `RecyclerViewAdapterSizeMatcher(size: `[`Int`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`<br>Matches RecyclerView with count of children |
 
 ### Functions
 
 | Name | Summary |
 |---|---|
 | [describeTo](describe-to.md) | `fun describeTo(description: Description): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) |
-| [matchesSafely](matches-safely.md) | `fun matchesSafely(view: RecyclerView?): `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) |
+| [matchesSafely](matches-safely.md) | `fun matchesSafely(view: RecyclerView): `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) |
diff --git a/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/matches-safely.md b/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/matches-safely.md
index 21dc30a6..85d2f1fd 100644
--- a/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/matches-safely.md
+++ b/docs/kakao/com.agoda.kakao/-recycler-view-adapter-size-matcher/matches-safely.md
@@ -2,4 +2,4 @@
 
 # matchesSafely
 
-`protected fun matchesSafely(view: RecyclerView?): `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html)
\ No newline at end of file
+`protected fun matchesSafely(view: RecyclerView): `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html)
\ No newline at end of file
diff --git a/docs/kakao/com.agoda.kakao/index.md b/docs/kakao/com.agoda.kakao/index.md
index d5b892d4..5c8207d7 100644
--- a/docs/kakao/com.agoda.kakao/index.md
+++ b/docs/kakao/com.agoda.kakao/index.md
@@ -60,7 +60,7 @@
 | [KViewPager](-k-view-pager/index.md) | `class KViewPager : `[`KBaseView`](-k-base-view/index.md)`<`[`KViewPager`](-k-view-pager/index.md)`>, `[`SwipeableActions`](-swipeable-actions/index.md)`, `[`ViewPagerAssertions`](-view-pager-assertions/index.md)<br>View with SwipeableActions and ViewPagerAssertions |
 | [KWebView](-k-web-view/index.md) | `open class KWebView`<br>Class for interacting with WebViews |
 | [ListViewAdapterAssertions](-list-view-adapter-assertions/index.md) | `interface ListViewAdapterAssertions : `[`AdapterAssertions`](-adapter-assertions/index.md)<br>Provides assertions for listView adapter |
-| [ListViewViewAdapterSizeMatcher](-list-view-view-adapter-size-matcher/index.md) | `class ListViewViewAdapterSizeMatcher : BoundedMatcher<`[`View`](https://developer.android.com/reference/android/view/View.html)`, `[`ListView`](https://developer.android.com/reference/android/widget/ListView.html)`>`<br>Matches ListView with count of childs |
+| [ListViewViewAdapterSizeMatcher](-list-view-view-adapter-size-matcher/index.md) | `class ListViewViewAdapterSizeMatcher : BoundedMatcher<`[`View`](https://developer.android.com/reference/android/view/View.html)`, `[`ListView`](https://developer.android.com/reference/android/widget/ListView.html)`>`<br>Matches ListView with count of children |
 | [NavigationItemMatcher](-navigation-item-matcher/index.md) | `class NavigationItemMatcher : BoundedMatcher<`[`View`](https://developer.android.com/reference/android/view/View.html)`, NavigationView>`<br>Matches NavigationView with given item id checked |
 | [NavigationViewActions](-navigation-view-actions/index.md) | `interface NavigationViewActions : `[`BaseActions`](-base-actions/index.md)<br>Provides actions for navigation view |
 | [NavigationViewAssertions](-navigation-view-assertions/index.md) | `interface NavigationViewAssertions : `[`BaseAssertions`](-base-assertions/index.md)<br>Provides assertions for NavigationView |
@@ -75,7 +75,7 @@
 | [RatingBarMatcher](-rating-bar-matcher/index.md) | `class RatingBarMatcher : BoundedMatcher<`[`View`](https://developer.android.com/reference/android/view/View.html)`, `[`RatingBar`](https://developer.android.com/reference/android/widget/RatingBar.html)`>`<br>Matcher of value rating of given matcher |
 | [RecyclerActions](-recycler-actions/index.md) | `interface RecyclerActions : `[`ScrollableActions`](-scrollable-actions/index.md)`, `[`SwipeableActions`](-swipeable-actions/index.md)<br>Provides ScrollableActions implementation for RecyclerView |
 | [RecyclerAdapterAssertions](-recycler-adapter-assertions/index.md) | `interface RecyclerAdapterAssertions : `[`AdapterAssertions`](-adapter-assertions/index.md)<br>Provides assertions for recyclerView adapter |
-| [RecyclerViewAdapterSizeMatcher](-recycler-view-adapter-size-matcher/index.md) | `class RecyclerViewAdapterSizeMatcher : BoundedMatcher<`[`View`](https://developer.android.com/reference/android/view/View.html)`, RecyclerView>`<br>Matches RecyclerView with count of childs |
+| [RecyclerViewAdapterSizeMatcher](-recycler-view-adapter-size-matcher/index.md) | `class RecyclerViewAdapterSizeMatcher : BoundedMatcher<`[`View`](https://developer.android.com/reference/android/view/View.html)`, RecyclerView>`<br>Matches RecyclerView with count of children |
 | [RootBuilder](-root-builder/index.md) | `class RootBuilder`<br>Class for building root matchers |
 | [Screen](-screen/index.md) | `open class Screen<out T : `[`Screen`](-screen/index.md)`<`[`T`](-screen/index.md#T)`>> : `[`ScreenActions`](-screen-actions/index.md)<br>Container class for UI elements. |
 | [ScreenActions](-screen-actions/index.md) | `interface ScreenActions`<br>Interface with common actions for all screens |