diff --git a/app/build.gradle b/app/build.gradle
index 6ba6b69..b84fdeb 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -30,10 +30,9 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.core:core-ktx:1.2.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'org.nanohttpd:nanohttpd:2.2.0'
     implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.0.0'
-    implementation 'androidx.preference:preference:1.1.0-rc01'
+    implementation 'androidx.preference:preference:1.1.1'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'