diff --git a/owncloud-android-library/build.gradle b/owncloud-android-library/build.gradle
index 7415fef9..77145f18 100644
--- a/owncloud-android-library/build.gradle
+++ b/owncloud-android-library/build.gradle
@@ -7,11 +7,11 @@ dependencies {
 }
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 26
 
     defaultConfig {
         minSdkVersion 14
-        targetSdkVersion 28
+        targetSdkVersion 26
     }
 
     lintOptions {
diff --git a/sample_client/build.gradle b/sample_client/build.gradle
index 2c6a702a..2ddad69b 100644
--- a/sample_client/build.gradle
+++ b/sample_client/build.gradle
@@ -5,11 +5,11 @@ dependencies {
 }
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 26
 
     defaultConfig {
         minSdkVersion 14
-        targetSdkVersion 28
+        targetSdkVersion 26
     }
 
     lintOptions {