diff --git a/oeffi/build.gradle b/oeffi/build.gradle
index c6e5f20..23f3d6e 100644
--- a/oeffi/build.gradle
+++ b/oeffi/build.gradle
@@ -12,7 +12,7 @@ configurations {
 
 dependencies {
     implementation project(':public-transport-enabler')
-    implementation 'androidx.annotation:annotation:1.3.0'
+    implementation 'androidx.annotation:annotation:1.4.0'
     implementation 'androidx.recyclerview:recyclerview:1.2.1'
     implementation 'androidx.coordinatorlayout:coordinatorlayout:1.2.0'
     implementation 'androidx.drawerlayout:drawerlayout:1.1.1'
diff --git a/oeffi/proguard.cfg b/oeffi/proguard.cfg
index 9376e30..2158d22 100644
--- a/oeffi/proguard.cfg
+++ b/oeffi/proguard.cfg
@@ -47,8 +47,10 @@
 
 # androidx
 -dontwarn androidx.core.**
+-dontwarn module-info
 -dontnote androidx.core.**
 -dontnote androidx.versionedparcelable.VersionedParcel
+-dontnote kotlin.**
 
 # OkHttp
 -dontwarn okio.DeflaterSink