diff --git a/.gitignore b/.gitignore
index 6d61d8f8..a927be0b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,6 +39,7 @@ captures/
 .idea/gradle.xml
 .idea/dictionaries
 .idea/libraries
+.idea/caches
 
 # External native build folder generated in Android Studio 2.2 and later
 .externalNativeBuild
diff --git a/.idea/code-comments.xml b/.idea/code-comments.xml
deleted file mode 100644
index 0557847e..00000000
--- a/.idea/code-comments.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="CodeComments">
-    <comments />
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
new file mode 100644
index 00000000..30aa626c
--- /dev/null
+++ b/.idea/codeStyles/Project.xml
@@ -0,0 +1,29 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <Objective-C-extensions>
+      <file>
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Import" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Macro" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Typedef" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Enum" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Constant" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Global" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Struct" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="FunctionPredecl" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Function" />
+      </file>
+      <class>
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Property" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Synthesize" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InitMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="StaticMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InstanceMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="DeallocMethod" />
+      </class>
+      <extensions>
+        <pair source="cpp" header="h" fileNamingConvention="NONE" />
+        <pair source="c" header="h" fileNamingConvention="NONE" />
+      </extensions>
+    </Objective-C-extensions>
+  </code_scheme>
+</component>
\ No newline at end of file
diff --git a/.idea/compiler.xml b/.idea/compiler.xml
deleted file mode 100644
index 96cc43ef..00000000
--- a/.idea/compiler.xml
+++ /dev/null
@@ -1,22 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="CompilerConfiguration">
-    <resourceExtensions />
-    <wildcardResourcePatterns>
-      <entry name="!?*.java" />
-      <entry name="!?*.form" />
-      <entry name="!?*.class" />
-      <entry name="!?*.groovy" />
-      <entry name="!?*.scala" />
-      <entry name="!?*.flex" />
-      <entry name="!?*.kt" />
-      <entry name="!?*.clj" />
-      <entry name="!?*.aj" />
-    </wildcardResourcePatterns>
-    <annotationProcessing>
-      <profile default="true" name="Default" enabled="false">
-        <processorPath useClasspath="true" />
-      </profile>
-    </annotationProcessing>
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/copyright/profiles_settings.xml b/.idea/copyright/profiles_settings.xml
deleted file mode 100644
index e7bedf33..00000000
--- a/.idea/copyright/profiles_settings.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<component name="CopyrightManager">
-  <settings default="" />
-</component>
\ No newline at end of file
diff --git a/.idea/encodings.xml b/.idea/encodings.xml
deleted file mode 100644
index 97626ba4..00000000
--- a/.idea/encodings.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="Encoding">
-    <file url="PROJECT" charset="UTF-8" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/markdown-navigator/profiles_settings.xml b/.idea/markdown-navigator/profiles_settings.xml
deleted file mode 100644
index 674a5916..00000000
--- a/.idea/markdown-navigator/profiles_settings.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<component name="MarkdownNavigator.ProfileManager">
-  <settings default="" />
-</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
index cbd46bd1..99202cc2 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,18 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="EntryPointsManager">
-    <entry_points version="2.0" />
-  </component>
   <component name="NullableNotNullManager">
     <option name="myDefaultNullable" value="android.support.annotation.Nullable" />
     <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
     <option name="myNullables">
       <value>
-        <list size="4">
+        <list size="5">
           <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
           <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
-          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
-          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
+          <item index="2" class="java.lang.String" itemvalue="javax.annotation.CheckForNull" />
+          <item index="3" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
+          <item index="4" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
         </list>
       </value>
     </option>
@@ -27,7 +25,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index 94a25f7f..35eb1ddf 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+    <mapping directory="" vcs="Git" />
   </component>
 </project>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index ee173928..582cb110 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,9 +3,13 @@
 buildscript {
     repositories {
         jcenter()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.android.tools.build:gradle:3.1.3'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.4.1'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -18,6 +22,10 @@ allprojects {
         maven {
             url 'https://maven.google.com'
         }
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index b7042350..8ef0f4c2 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Apr 18 10:07:31 ICT 2017
+#Thu Jun 14 11:36:01 MSK 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
diff --git a/imagepicker/build.gradle b/imagepicker/build.gradle
index cbf75a8d..996bb691 100644
--- a/imagepicker/build.gradle
+++ b/imagepicker/build.gradle
@@ -4,11 +4,11 @@ apply plugin: 'com.github.dcendents.android-maven'
 group = 'com.github.nguyenhoanglam'
 
 android {
-    compileSdkVersion 26
-    buildToolsVersion '26.0.1'
+    compileSdkVersion 27
+    buildToolsVersion '27.0.3'
     defaultConfig {
         minSdkVersion 15
-        targetSdkVersion 26
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
     }
@@ -23,12 +23,12 @@ android {
 }
 
 dependencies {
-    compile fileTree(include: ['*.jar'], dir: 'libs')
-    testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:26.0.1'
-    compile 'com.android.support:recyclerview-v7:26.0.1'
-    compile 'com.android.support:design:26.0.1'
-    compile 'com.github.bumptech.glide:glide:4.0.0'
-    compile 'com.android.support:support-v4:26.0.1'
-    annotationProcessor 'com.github.bumptech.glide:compiler:4.0.0'
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    testImplementation 'junit:junit:4.12'
+    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.android.support:recyclerview-v7:27.1.1'
+    implementation 'com.android.support:design:27.1.1'
+    implementation 'com.github.bumptech.glide:glide:4.7.1'
+    implementation 'com.android.support:support-v4:27.1.1'
+    annotationProcessor 'com.github.bumptech.glide:compiler:4.7.1'
 }
diff --git a/sample/build.gradle b/sample/build.gradle
index b53e7c03..ec122361 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
-    buildToolsVersion '26.0.1'
+    compileSdkVersion 27
+    buildToolsVersion '27.0.3'
     defaultConfig {
         applicationId "com.nguyenhoanglam.sample"
         minSdkVersion 15
-        targetSdkVersion 26
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
     }
@@ -21,8 +21,11 @@ android {
 }
 
 dependencies {
-    compile fileTree(include: ['*.jar'], dir: 'libs')
-    testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:26.0.1'
-    compile project(':imagepicker')
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    testImplementation 'junit:junit:4.12'
+    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.android.support:recyclerview-v7:27.1.1'
+    implementation project(':imagepicker')
+    implementation 'com.github.bumptech.glide:glide:4.7.1'
+    annotationProcessor 'com.github.bumptech.glide:compiler:4.7.1'
 }