diff --git a/build.gradle b/build.gradle
index 468f6a5..88524c3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.1.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle.properties b/gradle.properties
index 1544a6e..f2c4e87 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -34,5 +34,5 @@ POM_DEVELOPER_NAME=Zhang Hai
 
 ANDROID_MIN_SDK_VERSION=14
 ANDROID_COMPILE_SDK_VERSION=27
-ANDROID_BUILD_TOOLS_VERSION=27.0.0
+ANDROID_BUILD_TOOLS_VERSION=27.0.3
 ANDROID_TARGET_SDK_VERSION=27
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 58c205c..d3fbec4 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Fri Nov 10 11:01:10 PST 2017
+#Fri May 18 10:51:47 PDT 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
diff --git a/library/build.gradle b/library/build.gradle
index 28d3391..05f5ef6 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -26,9 +26,9 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:27.0.1'
-    compile 'com.android.support:support-annotations:27.0.1'
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.android.support:support-annotations:27.1.1'
 }
 
 apply from: '../gradle-mvn-push.gradle'
diff --git a/sample/build.gradle b/sample/build.gradle
index f4fa336..5f823c4 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -38,9 +38,9 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:27.0.1'
-    compile 'com.jakewharton:butterknife:8.8.1'
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.jakewharton:butterknife:8.8.1'
     annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
-    compile project(':library')
+    implementation project(':library')
 }