diff --git a/app/src/main/java/apps/amine/bou/readerforselfoss/AddSourceActivity.kt b/app/src/main/java/apps/amine/bou/readerforselfoss/AddSourceActivity.kt
index ad2bb5d..0517f2e 100644
--- a/app/src/main/java/apps/amine/bou/readerforselfoss/AddSourceActivity.kt
+++ b/app/src/main/java/apps/amine/bou/readerforselfoss/AddSourceActivity.kt
@@ -52,19 +52,19 @@ class AddSourceActivity : AppCompatActivity() {
         scoop.bindStatusBar(this, Toppings.PRIMARY_DARK.value)
 
         val drawable = binding.nameInput.background
-        drawable.setColorFilter(appColors.colorAccent, PorterDuff.Mode.SRC_ATOP)
+        drawable.setTint(appColors.colorAccent)
 
 
         // TODO: clean
         binding.nameInput.background = drawable
 
         val drawable1 = binding.sourceUri.background
-        drawable1.setColorFilter(appColors.colorAccent, PorterDuff.Mode.SRC_ATOP)
+        drawable1.setTint(appColors.colorAccent)
 
         binding.sourceUri.background = drawable1
 
         val drawable2 = binding.tags.background
-        drawable2.setColorFilter(appColors.colorAccent, PorterDuff.Mode.SRC_ATOP)
+        drawable2.setTint(appColors.colorAccent)
 
         binding.tags.background = drawable2
 
diff --git a/app/src/main/java/apps/amine/bou/readerforselfoss/MyApp.kt b/app/src/main/java/apps/amine/bou/readerforselfoss/MyApp.kt
index d44d688..2808320 100644
--- a/app/src/main/java/apps/amine/bou/readerforselfoss/MyApp.kt
+++ b/app/src/main/java/apps/amine/bou/readerforselfoss/MyApp.kt
@@ -61,14 +61,14 @@ class MyApp : MultiDexApplication() {
     private fun initDrawerImageLoader() {
         DrawerImageLoader.init(object : AbstractDrawerImageLoader() {
             override fun set(imageView: ImageView, uri: Uri, placeholder: Drawable, tag: String?) {
-                Glide.with(imageView?.context)
+                Glide.with(imageView.context)
                     .loadMaybeBasicAuth(config, uri.toString())
                     .apply(RequestOptions.fitCenterTransform().placeholder(placeholder))
                     .into(imageView)
             }
 
             override fun cancel(imageView: ImageView) {
-                Glide.with(imageView?.context).clear(imageView)
+                Glide.with(imageView.context).clear(imageView)
             }
 
             override fun placeholder(ctx: Context, tag: String?): Drawable {
diff --git a/app/src/main/java/apps/amine/bou/readerforselfoss/ReaderActivity.kt b/app/src/main/java/apps/amine/bou/readerforselfoss/ReaderActivity.kt
index 6a23c55..24b08e9 100644
--- a/app/src/main/java/apps/amine/bou/readerforselfoss/ReaderActivity.kt
+++ b/app/src/main/java/apps/amine/bou/readerforselfoss/ReaderActivity.kt
@@ -127,7 +127,7 @@ class ReaderActivity : AppCompatActivity() {
         notifyAdapter()
 
         binding.pager.setPageTransformer(true, DepthPageTransformer())
-        (binding.indicator as CircleIndicator).setViewPager(binding.pager)
+        binding.indicator.setViewPager(binding.pager)
 
         binding.pager.addOnPageChangeListener(
             object : ViewPager.SimpleOnPageChangeListener() {
diff --git a/app/src/main/java/apps/amine/bou/readerforselfoss/api/selfoss/SelfossModels.kt b/app/src/main/java/apps/amine/bou/readerforselfoss/api/selfoss/SelfossModels.kt
index 8e0d919..0988cc0 100644
--- a/app/src/main/java/apps/amine/bou/readerforselfoss/api/selfoss/SelfossModels.kt
+++ b/app/src/main/java/apps/amine/bou/readerforselfoss/api/selfoss/SelfossModels.kt
@@ -14,6 +14,8 @@ import com.bumptech.glide.Glide
 import com.bumptech.glide.load.engine.DiskCacheStrategy
 import com.bumptech.glide.request.RequestOptions
 import com.google.gson.annotations.SerializedName
+import java.util.*
+import kotlin.collections.ArrayList
 
 private fun constructUrl(config: Config?, path: String, file: String?): String {
     return if (file.isEmptyOrNullOrNullString()) {
@@ -155,14 +157,14 @@ data class Item(
     }
 
     fun getImages() : ArrayList<String> {
-        var allImages = ArrayList<String>()
+        val allImages = ArrayList<String>()
 
         for ( image in Jsoup.parse(content).getElementsByTag("img")) {
             val url = image.attr("src")
-            if (url.toLowerCase().contains(".jpg") ||
-                    url.toLowerCase().contains(".jpeg") ||
-                    url.toLowerCase().contains(".png") ||
-                    url.toLowerCase().contains(".webp"))
+            if (url.lowercase(Locale.US).contains(".jpg") ||
+                    url.lowercase(Locale.US).contains(".jpeg") ||
+                    url.lowercase(Locale.US).contains(".png") ||
+                    url.lowercase(Locale.US).contains(".webp"))
             {
                 allImages.add(url)
             }
diff --git a/app/src/main/java/apps/amine/bou/readerforselfoss/fragments/ArticleFragment.kt b/app/src/main/java/apps/amine/bou/readerforselfoss/fragments/ArticleFragment.kt
index 8ea66b3..debb7d6 100644
--- a/app/src/main/java/apps/amine/bou/readerforselfoss/fragments/ArticleFragment.kt
+++ b/app/src/main/java/apps/amine/bou/readerforselfoss/fragments/ArticleFragment.kt
@@ -48,6 +48,7 @@ import retrofit2.Callback
 import retrofit2.Response
 import java.net.MalformedURLException
 import java.net.URL
+import java.util.*
 import java.util.concurrent.ExecutionException
 import kotlin.collections.ArrayList
 
@@ -430,19 +431,19 @@ class ArticleFragment : Fragment() {
 
             override fun shouldInterceptRequest(view: WebView?, url: String): WebResourceResponse? {
                 val glideOptions = RequestOptions.diskCacheStrategyOf(DiskCacheStrategy.ALL)
-                if (url.toLowerCase().contains(".jpg") || url.toLowerCase().contains(".jpeg")) {
+                if (url.lowercase(Locale.US).contains(".jpg") || url.lowercase(Locale.US).contains(".jpeg")) {
                     try {
                         val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
                         return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.JPEG))
                     }catch ( e : ExecutionException) {}
                 }
-                else if (url.toLowerCase().contains(".png")) {
+                else if (url.lowercase(Locale.US).contains(".png")) {
                     try {
                         val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
                         return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.PNG))
                     }catch ( e : ExecutionException) {}
                 }
-                else if (url.toLowerCase().contains(".webp")) {
+                else if (url.lowercase(Locale.US).contains(".webp")) {
                     try {
                         val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
                         return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.WEBP))
diff --git a/app/src/main/java/apps/amine/bou/readerforselfoss/utils/AppUtils.kt b/app/src/main/java/apps/amine/bou/readerforselfoss/utils/AppUtils.kt
index 35e5a72..f206294 100644
--- a/app/src/main/java/apps/amine/bou/readerforselfoss/utils/AppUtils.kt
+++ b/app/src/main/java/apps/amine/bou/readerforselfoss/utils/AppUtils.kt
@@ -13,7 +13,7 @@ fun String.longHash(): Long {
     val chars = this.toCharArray()
 
     for (i in 0 until l) {
-        h = 31 * h + chars[i].toLong()
+        h = 31 * h + chars[i].code.toLong()
     }
     return h
 }