diff --git a/app/build.gradle b/app/build.gradle
index ae39924..546f336 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -44,7 +44,7 @@ dependencies {
     // compile
     compile fileTree(dir: 'libs', include: ['*.jar'])
     compile "com.android.support:appcompat-v7:${supportLibVersion}"
-    compile 'com.squareup.okhttp3:okhttp:3.2.0'
+    compile 'com.squareup.okhttp3:okhttp:4.9.1'
     compile('de.psdev.licensesdialog:licensesdialog:1.8.1')
 
     // jUnit