diff --git a/library/src/main/AndroidManifest.xml b/library/src/main/AndroidManifest.xml
index 7099f22..c79637f 100644
--- a/library/src/main/AndroidManifest.xml
+++ b/library/src/main/AndroidManifest.xml
@@ -1 +1 @@
-<manifest package="eu.kanade.tachiyomi.extensions"></manifest>
+<manifest package="eu.kanade.tachiyomi.extensions" />
diff --git a/library/src/main/java/eu/kanade/tachiyomi/network/OkHttpExtensions.kt b/library/src/main/java/eu/kanade/tachiyomi/network/OkHttpExtensions.kt
index 455f455..6b74a2a 100644
--- a/library/src/main/java/eu/kanade/tachiyomi/network/OkHttpExtensions.kt
+++ b/library/src/main/java/eu/kanade/tachiyomi/network/OkHttpExtensions.kt
@@ -4,10 +4,6 @@ import okhttp3.Call
 import okhttp3.Response
 import rx.Observable
 
-fun Call.asObservable(): Observable<Response> {
-    throw Exception("Stub!")
-}
+fun Call.asObservable(): Observable<Response> = throw Exception("Stub!")
 
-fun Call.asObservableSuccess(): Observable<Response> {
-    throw Exception("Stub!")
-}
+fun Call.asObservableSuccess(): Observable<Response> = throw Exception("Stub!")
diff --git a/library/src/main/java/eu/kanade/tachiyomi/source/ConfigurableSource.kt b/library/src/main/java/eu/kanade/tachiyomi/source/ConfigurableSource.kt
index b6f4068..f6de8d3 100644
--- a/library/src/main/java/eu/kanade/tachiyomi/source/ConfigurableSource.kt
+++ b/library/src/main/java/eu/kanade/tachiyomi/source/ConfigurableSource.kt
@@ -1,7 +1,9 @@
 package eu.kanade.tachiyomi.source
 
+import androidx.preference.PreferenceScreen
+
 interface ConfigurableSource {
 
-    fun setupPreferenceScreen(screen: androidx.preference.PreferenceScreen)
+    fun setupPreferenceScreen(screen: PreferenceScreen)
 
 }