diff --git a/oeffi/build.gradle b/oeffi/build.gradle
index 2bb80b3..fd99b25 100644
--- a/oeffi/build.gradle
+++ b/oeffi/build.gradle
@@ -26,7 +26,7 @@ dependencies {
     implementation 'com.google.guava:guava:31.1-android'
     implementation 'org.osmdroid:osmdroid-android:6.1.14'
     implementation 'org.slf4j:slf4j-api:1.7.36'
-    implementation 'com.github.tony19:logback-android:2.0.1'
+    implementation 'com.github.tony19:logback-android:3.0.0'
     testImplementation 'junit:junit:4.13.2'
 }
 
diff --git a/oeffi/proguard.cfg b/oeffi/proguard.cfg
index 236ee08..0c6bf6f 100644
--- a/oeffi/proguard.cfg
+++ b/oeffi/proguard.cfg
@@ -79,8 +79,9 @@
 -dontnote dalvik.system.CloseGuard
 
 # slf4j
--dontwarn org.slf4j.MDC
--dontwarn org.slf4j.MarkerFactory
+-dontwarn org.slf4j.spi.SLF4JServiceProvider
+-dontwarn org.slf4j.LoggerFactory
+-dontwarn ch.qos.logback.classic.Logger
 
 # logback-android
 -dontwarn javax.mail.**