diff --git a/SPD-classes/build.gradle b/SPD-classes/build.gradle
index 0dea7f665..c06d3277e 100644
--- a/SPD-classes/build.gradle
+++ b/SPD-classes/build.gradle
@@ -1,8 +1,8 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 26
-    buildToolsVersion "26.0.3"
+    compileSdkVersion 27
+    buildToolsVersion "27.0.3"
 
     task ndkBuild(type: Exec){
         description "builds JNI libs from source. " +
diff --git a/core/build.gradle b/core/build.gradle
index ab5083da0..2c3e74f80 100644
--- a/core/build.gradle
+++ b/core/build.gradle
@@ -1,8 +1,8 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
-    buildToolsVersion "26.0.3"
+    compileSdkVersion 27
+    buildToolsVersion "27.0.3"
 
     defaultConfig {
         resConfigs "en_US", "cs", "tr", "ca", "ko", "pl", "it",
diff --git a/core/src/main/AndroidManifest.xml b/core/src/main/AndroidManifest.xml
index 4f8ea29b7..e3a44fd32 100644
--- a/core/src/main/AndroidManifest.xml
+++ b/core/src/main/AndroidManifest.xml
@@ -7,7 +7,7 @@
 
 	<uses-sdk
 		android:minSdkVersion="8"
-		android:targetSdkVersion="26"/>
+		android:targetSdkVersion="27"/>
 	
 	<uses-feature
 		android:glEsVersion="0x00020000"/>