diff --git a/app/build.gradle b/app/build.gradle
index 0e0cdb6..16cdc34 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -28,7 +28,7 @@ android {
         exclude 'META-INF/LICENSE'
         exclude 'META-INF/DEPENDENCIES'
     }
-    compileSdkVersion 30
+    compileSdkVersion 33
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
@@ -39,7 +39,7 @@ android {
     defaultConfig {
         applicationId "com.wbrawner.simplemarkdown"
         minSdkVersion 23
-        targetSdkVersion 30
+        targetSdkVersion 33
         versionCode 34
         versionName "0.8.12"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
@@ -90,39 +90,37 @@ android {
 
 dependencies {
     samsungImplementation project(":IAP5Helper")
-    def navigation_version = '2.3.5'
+    def navigation_version = '2.5.3'
     implementation "androidx.navigation:navigation-fragment-ktx:$navigation_version"
     implementation "androidx.navigation:navigation-ui-ktx:$navigation_version"
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13.2'
     testImplementation 'org.robolectric:robolectric:4.2.1'
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    def espresso_version = '3.3.0'
+    def espresso_version = '3.4.0'
     androidTestImplementation "androidx.test.espresso:espresso-core:$espresso_version"
     androidTestImplementation "androidx.test.espresso:espresso-web:$espresso_version"
     androidTestImplementation "androidx.test.espresso:espresso-intents:$espresso_version"
-    def android_test = '1.4.0-rc01'
+    def android_test = '1.4.0'
     androidTestImplementation "androidx.test:runner:$android_test"
     androidTestImplementation "androidx.test:rules:$android_test"
-    androidTestUtil "androidx.test:orchestrator:$android_test"
-    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestUtil "androidx.test:orchestrator:1.4.1"
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.uiautomator:uiautomator:2.2.0'
-    implementation 'androidx.appcompat:appcompat:1.3.0'
-    implementation 'androidx.preference:preference-ktx:1.1.1'
-    implementation "androidx.fragment:fragment-ktx:1.3.5"
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
-    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'androidx.appcompat:appcompat:1.5.1'
+    implementation 'androidx.preference:preference-ktx:1.2.0'
+    implementation "androidx.fragment:fragment-ktx:1.5.4"
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    implementation 'com.google.android.material:material:1.7.0'
     implementation 'androidx.legacy:legacy-support-v13:1.0.0'
     implementation 'com.commonsware.cwac:anddown:0.3.0'
-    implementation 'com.jakewharton.timber:timber:4.7.1'
-    playImplementation 'com.android.billingclient:billing:4.0.0'
+    implementation 'com.jakewharton.timber:timber:5.0.1'
+    playImplementation 'com.android.billingclient:billing:5.0.0'
     playImplementation 'com.google.android.play:core-ktx:1.8.1'
-    playImplementation 'com.google.firebase:firebase-crashlytics:18.1.0'
-    playImplementation 'com.google.firebase:firebase-analytics:19.0.0'
-    implementation "androidx.core:core-ktx:1.5.0"
-    implementation 'androidx.browser:browser:1.3.0'
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    def coroutines_version = "1.3.7"
-    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version"
+    playImplementation 'com.google.firebase:firebase-crashlytics:18.3.1'
+    playImplementation 'com.google.firebase:firebase-analytics:21.2.0'
+    implementation "androidx.core:core-ktx:1.9.0"
+    implementation 'androidx.browser:browser:1.4.0'
+    def coroutines_version = "1.6.4"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutines_version"
     def lifecycle_version = "2.2.0"
     implementation "androidx.lifecycle:lifecycle-extensions:$lifecycle_version"
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 03f2e80..09b99cc 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -20,6 +20,7 @@
         <activity
             android:name=".view.activity.SplashActivity"
             android:theme="@style/AppTheme.Splash"
+            android:exported="true"
             android:label="@string/app_name_short">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -41,7 +42,7 @@
                 <data android:host="*" />
             </intent-filter>
         </activity>
-        <activity android:name=".view.activity.MainActivity" />
+        <activity android:name=".view.activity.MainActivity" android:exported="false" />
 
         <provider
             android:name="androidx.core.content.FileProvider"
diff --git a/app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsFragment.kt b/app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsFragment.kt
index 4c051da..13b8aa8 100644
--- a/app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsFragment.kt
+++ b/app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsFragment.kt
@@ -32,14 +32,16 @@ class SettingsFragment
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
         lifecycleScope.launch(context = Dispatchers.IO) {
-            val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(activity)
+            val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(requireContext())
             sharedPreferences.registerOnSharedPreferenceChangeListener(this@SettingsFragment)
             (findPreference(getString(R.string.pref_key_dark_mode)) as? ListPreference)?.let {
                 setListPreferenceSummary(sharedPreferences, it)
             }
             @Suppress("ConstantConditionIf")
             if (!BuildConfig.ENABLE_CUSTOM_CSS) {
-                preferenceScreen.removePreference(findPreference(getString(R.string.pref_custom_css)))
+                findPreference<Preference>(getString(R.string.pref_custom_css))?.let {
+                    preferenceScreen.removePreference(it)
+                }
             }
         }
     }
diff --git a/build.gradle b/build.gradle
index 766147d..77f1a25 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,16 +1,16 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.5.20'
+    ext.kotlin_version = '1.7.20'
     repositories {
         google()
         mavenCentral()
         maven {url 'https://plugins.gradle.org/m2/' }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.2.1'
-        classpath 'com.google.gms:google-services:4.3.8'
-        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.7.1'
+        classpath 'com.android.tools.build:gradle:7.3.1'
+        classpath 'com.google.gms:google-services:4.3.14'
+        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.9.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "com.osacky.flank.gradle:fladle:0.14.1"
     }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 0f2aaab..f080157 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-all.zip