diff --git a/app/build.gradle b/app/build.gradle
index 287a76b..710b0d4 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -5,9 +5,9 @@ buildscript {
     }
     dependencies {
         classpath 'com.dicedmelon.gradle:jacoco-android:0.1.1'
-        classpath 'org.kt3k.gradle.plugin:coveralls-gradle-plugin:2.6.3'
-        classpath 'com.github.ben-manes:gradle-versions-plugin:0.13.0'
-        classpath 'gradle.plugin.com.github.sherter.google-java-format:google-java-format-gradle-plugin:0.5'
+        classpath 'org.kt3k.gradle.plugin:coveralls-gradle-plugin:2.8.1'
+        classpath 'com.github.ben-manes:gradle-versions-plugin:0.15.0'
+        classpath 'gradle.plugin.com.github.sherter.google-java-format:google-java-format-gradle-plugin:0.6'
     }
 }
 
@@ -24,13 +24,11 @@ jacocoAndroidUnitTestReport {
 }
 
 android {
-    compileSdkVersion 25
-    // buildToolsVersion '26.0.2'
+    compileSdkVersion 27
 
     defaultConfig {
         applicationId "edu.luc.etl.cs313.android.stopwatch"
         minSdkVersion 15
-        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -53,29 +51,27 @@ android {
         unitTests.includeAndroidResources = true
     }
     sourceSets {
-        sourceSets {
-            final String sharedTestDir = 'src/main/java/test/android'
-            test {
-                java.srcDir sharedTestDir
-            }
-            androidTest {
-                java.srcDir sharedTestDir
-            }
+        final String sharedTestDir = 'src/main/java/test/android'
+        test {
+            java.srcDir sharedTestDir
+        }
+        androidTest {
+            java.srcDir sharedTestDir
         }
     }
 }
 
 dependencies {
     implementation 'junit:junit:4.12'
-    implementation 'com.android.support:appcompat-v7:25.2.0'
+    implementation 'com.android.support:appcompat-v7:27.1.1'
     implementation 'net.sourceforge.streamsupport:streamsupport:1.5.2'
     // several duplications on account of shared testcase superclass
     testImplementation 'junit:junit:4.12'
-    testImplementation 'com.android.support.test:rules:0.5'
+    testImplementation 'com.android.support.test:rules:1.0.2'
     testImplementation 'org.robolectric:robolectric:3.5.1'
-    testImplementation 'com.android.support:appcompat-v7:25.2.0'
+    testImplementation 'com.android.support:appcompat-v7:27.1.1'
     androidTestImplementation 'junit:junit:4.12'
-    androidTestImplementation 'com.android.support:appcompat-v7:25.2.0'
-    androidTestImplementation 'com.android.support.test:rules:0.5'
-    androidTestImplementation 'com.android.support.test:runner:0.5'
+    androidTestImplementation 'com.android.support:appcompat-v7:27.1.1'
+    androidTestImplementation 'com.android.support.test:rules:1.0.2'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
 }