diff --git a/oeffi/build.gradle b/oeffi/build.gradle
index 85d22b2..5a4af95 100644
--- a/oeffi/build.gradle
+++ b/oeffi/build.gradle
@@ -7,6 +7,7 @@ configurations {
     all*.exclude group: 'org.json', module: 'json'
     all*.exclude group: 'net.sf.kxml', module: 'kxml2'
     all*.exclude group: 'androidx.legacy', module: 'legacy-support-core-ui'
+    all*.exclude group: 'androidx.core', module: 'core-ktx'
 }
 
 dependencies {
diff --git a/oeffi/proguard.cfg b/oeffi/proguard.cfg
index 2d1732a..236ee08 100644
--- a/oeffi/proguard.cfg
+++ b/oeffi/proguard.cfg
@@ -52,6 +52,7 @@
 -dontnote androidx.versionedparcelable.VersionedParcel
 -dontnote kotlin.**
 -dontnote kotlinx.**
+-dontwarn androidx.lifecycle.SavedStateHandle
 
 # OkHttp
 -dontwarn okio.DeflaterSink