diff --git a/IAP5Helper/build.gradle b/IAP5Helper/build.gradle
index 07c7c88..333d65e 100644
--- a/IAP5Helper/build.gradle
+++ b/IAP5Helper/build.gradle
@@ -1,11 +1,11 @@
 apply plugin: 'com.android.library'
 android {
-    compileSdkVersion 23
-    buildToolsVersion '27.0.3'
+    compileSdkVersion 28
+    buildToolsVersion '28.0.2'
 
     defaultConfig {
         minSdkVersion 14
-        targetSdkVersion 15
+        targetSdkVersion 28
     }
 
     buildTypes {
diff --git a/app/build.gradle b/app/build.gradle
index df29cdd..54d05cb 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -11,8 +11,8 @@ android {
         exclude 'META-INF/LICENSE'
         exclude 'META-INF/DEPENDENCIES'
     }
-    compileSdkVersion 27
-    buildToolsVersion '27.0.3'
+    compileSdkVersion 28
+    buildToolsVersion '28.0.2'
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
@@ -20,7 +20,7 @@ android {
     defaultConfig {
         applicationId "com.wbrawner.simplemarkdown"
         minSdkVersion 19
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode 13
         versionName "0.4.7"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -51,7 +51,7 @@ android {
 
 ext {
     firebase_version = '16.1.0'
-    support_version = "27.1.0"
+    support_version = "28.0.0"
 }
 
 dependencies {
@@ -68,12 +68,12 @@ dependencies {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
 
-    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
-    androidTestImplementation 'com.android.support.test:runner:1.0.1'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.uiautomator:uiautomator-v18:2.1.3'
 
     implementation "com.android.support:appcompat-v7:$support_version"
-    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
     implementation "com.android.support:design:$support_version"
     implementation "com.android.support:support-v13:$support_version"
     implementation 'com.commonsware.cwac:anddown:0.3.0'
@@ -81,8 +81,8 @@ dependencies {
     implementation 'com.jakewharton:butterknife:8.7.0'
     implementation 'com.jakewharton.rxbinding2:rxbinding:2.0.0'
     implementation 'com.jakewharton.rxbinding2:rxbinding-design:2.0.0'
-    implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'
-    implementation 'io.reactivex.rxjava2:rxjava:2.1.0'
+    implementation 'io.reactivex.rxjava2:rxandroid:2.1.0'
+    implementation 'io.reactivex.rxjava2:rxjava:2.2.2'
     implementation "com.google.firebase:firebase-core:16.0.3"
     implementation "com.google.firebase:firebase-perf:$firebase_version"
     samsungImplementation project(":IAP5Helper")
diff --git a/build.gradle b/build.gradle
index 20b741a..130b95c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.4'
+        classpath 'com.android.tools.build:gradle:3.2.0'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
         classpath 'com.google.gms:google-services:4.0.1'
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 78a9504..215146a 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Mon Aug 20 19:40:47 CDT 2018
+#Mon Oct 01 17:32:53 CDT 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip