diff --git a/app/build.gradle b/app/build.gradle
index c206ffcb3..9e18f5bc5 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -61,12 +61,12 @@ tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
 }
 dependencies {
 	implementation fileTree(dir: 'libs', include: ['*.jar', '*.aar'])
-	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.3'
-	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.4.3'
+	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.0'
+	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.0'
 
-	implementation 'androidx.core:core-ktx:1.5.0-rc01'
-	implementation 'androidx.activity:activity-ktx:1.2.2'
-	implementation 'androidx.fragment:fragment-ktx:1.3.3'
+	implementation 'androidx.core:core-ktx:1.5.0'
+	implementation 'androidx.activity:activity-ktx:1.2.3'
+	implementation 'androidx.fragment:fragment-ktx:1.3.4'
 	implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.3.1'
 	implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.1'
 	implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.3.1'
@@ -93,15 +93,15 @@ dependencies {
 	implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl:4.3.0'
 	implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl-viewbinding:4.3.0'
 
-	implementation 'io.insert-koin:koin-android:3.0.1'
-	implementation 'io.insert-koin:koin-android-ext:3.0.1'
-	implementation 'io.coil-kt:coil-base:1.1.1'
+	implementation 'io.insert-koin:koin-android:3.0.2'
+	implementation 'io.insert-koin:koin-android-ext:3.0.2'
+	implementation 'io.coil-kt:coil-base:1.2.1'
 	implementation 'com.davemorrissey.labs:subsampling-scale-image-view-androidx:3.10.0'
 	implementation 'com.github.solkin:disk-lru-cache:1.2'
 
 	debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.7'
 
 	testImplementation 'junit:junit:4.13.2'
-	testImplementation 'org.json:json:20201115'
-	testImplementation 'io.insert-koin:koin-test-junit4:3.0.1'
+	testImplementation 'org.json:json:20210307'
+	testImplementation 'io.insert-koin:koin-test-junit4:3.0.2'
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/koitharu/kotatsu/browser/BrowserActivity.kt b/app/src/main/java/org/koitharu/kotatsu/browser/BrowserActivity.kt
index 867c5e3fc..e5be6808c 100644
--- a/app/src/main/java/org/koitharu/kotatsu/browser/BrowserActivity.kt
+++ b/app/src/main/java/org/koitharu/kotatsu/browser/BrowserActivity.kt
@@ -41,7 +41,7 @@ class BrowserActivity : BaseActivity<ActivityBrowserBinding>(), BrowserCallback
 		}
 	}
 
-	override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+	override fun onCreateOptionsMenu(menu: Menu): Boolean {
 		menuInflater.inflate(R.menu.opt_browser, menu)
 		return super.onCreateOptionsMenu(menu)
 	}
diff --git a/app/src/main/java/org/koitharu/kotatsu/details/ui/DetailsActivity.kt b/app/src/main/java/org/koitharu/kotatsu/details/ui/DetailsActivity.kt
index eacf132f9..8cc025234 100644
--- a/app/src/main/java/org/koitharu/kotatsu/details/ui/DetailsActivity.kt
+++ b/app/src/main/java/org/koitharu/kotatsu/details/ui/DetailsActivity.kt
@@ -113,7 +113,7 @@ class DetailsActivity : BaseActivity<ActivityDetailsBinding>(),
 		}
 	}
 
-	override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+	override fun onCreateOptionsMenu(menu: Menu): Boolean {
 		menuInflater.inflate(R.menu.opt_details, menu)
 		return super.onCreateOptionsMenu(menu)
 	}
diff --git a/app/src/main/java/org/koitharu/kotatsu/reader/ui/ReaderActivity.kt b/app/src/main/java/org/koitharu/kotatsu/reader/ui/ReaderActivity.kt
index 5b53b41ff..22d66a6c6 100644
--- a/app/src/main/java/org/koitharu/kotatsu/reader/ui/ReaderActivity.kt
+++ b/app/src/main/java/org/koitharu/kotatsu/reader/ui/ReaderActivity.kt
@@ -124,7 +124,7 @@ class ReaderActivity : BaseFullscreenActivity<ActivityReaderBinding>(),
 		}
 	}
 
-	override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+	override fun onCreateOptionsMenu(menu: Menu): Boolean {
 		menuInflater.inflate(R.menu.opt_reader_top, menu)
 		return super.onCreateOptionsMenu(menu)
 	}
diff --git a/app/src/main/java/org/koitharu/kotatsu/widget/shelf/ShelfConfigActivity.kt b/app/src/main/java/org/koitharu/kotatsu/widget/shelf/ShelfConfigActivity.kt
index fabf1fbba..1946fb0dd 100644
--- a/app/src/main/java/org/koitharu/kotatsu/widget/shelf/ShelfConfigActivity.kt
+++ b/app/src/main/java/org/koitharu/kotatsu/widget/shelf/ShelfConfigActivity.kt
@@ -58,7 +58,7 @@ class ShelfConfigActivity : BaseActivity<ActivityCategoriesBinding>(), OnListIte
 		viewModel.onError.observe(this, this::onError)
 	}
 
-	override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+	override fun onCreateOptionsMenu(menu: Menu): Boolean {
 		menuInflater.inflate(R.menu.opt_config, menu)
 		return super.onCreateOptionsMenu(menu)
 	}
diff --git a/build.gradle b/build.gradle
index c92340660..144344709 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
 	}
 	dependencies {
 		classpath 'com.android.tools.build:gradle:4.1.3'
-		classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.32'
+		classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.0'
 
 		// NOTE: Do not place your application dependencies here; they belong
 		// in the individual module build.gradle files