diff --git a/android/app/build.gradle b/android/app/build.gradle
index 447f621f2..3b95321d7 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -352,6 +352,7 @@ dependencies {
   implementation libs.androidx.work.runtime
   implementation libs.androidx.lifecycle.process
   implementation libs.androidx.documentfile
+  // 1.13 Material library version doesn't render properly alpha properties on map buttons
   implementation libs.android.material
   // Fix for app/organicmaps/util/FileUploadWorker.java:14: error: cannot access ListenableFuture
   // https://github.com/organicmaps/organicmaps/issues/6106