diff --git a/app/build.gradle b/app/build.gradle
index 080422af46..d6119e8874 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -16,7 +16,6 @@ apply plugin: 'com.jakewharton.butterknife'
 
 ext {
     supportLibraryVersion = "27.0.2"
-    sdkBuildVersion = "27.0.3"
     ormLiteVersion = "4.46"
     powermockVersion = "1.7.3"
     dexmakerVersion = "1.2"
@@ -56,13 +55,12 @@ tasks.matching {it instanceof Test}.all {
 }
 
 android {
-    compileSdkVersion 27
-    buildToolsVersion "${sdkBuildVersion}"
+    compileSdkVersion 26
 
     defaultConfig {
         applicationId "info.nightscout.androidaps"
         minSdkVersion 21
-        targetSdkVersion 27
+        targetSdkVersion 25
         multiDexEnabled true
         versionCode 1500
         version "1.60c-dev"
@@ -78,7 +76,7 @@ android {
         // TODO remove once wear dependency com.google.android.gms:play-services-wearable:7.3.0
         // has been upgraded (requiring significant code changes), which currently fails release
         // build with a deprecation warning
-        // abortOnError false
+        abortOnError false
         // (disabled entirely to avoid reports on the error, which would still be displayed
         //  and it's easy to overlook that it's ignored)
         checkReleaseBuilds false
diff --git a/wear/build.gradle b/wear/build.gradle
index e842aae62f..7d8863fe33 100644
--- a/wear/build.gradle
+++ b/wear/build.gradle
@@ -1,8 +1,7 @@
 apply plugin: 'com.android.application'
 
 ext {
-    supportLibraryVersion = "23.0.1"
-    wearableVersion = "2.0.1"    
+    wearableVersion = "2.0.1"
 }
 
 def generateGitBuild = { ->
@@ -28,12 +27,11 @@ def generateGitBuild = { ->
 
 android {
     compileSdkVersion 23
-    buildToolsVersion "27.0.3"
 
     defaultConfig {
         applicationId "info.nightscout.androidaps"
-        minSdkVersion 20
-        targetSdkVersion 23
+        minSdkVersion 21
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0.2"
         buildConfigField "String", "BUILDVERSION", generateGitBuild()