diff --git a/src/es/monoschinos/build.gradle b/src/es/monoschinos/build.gradle
index c0b9609cf..0d406a050 100644
--- a/src/es/monoschinos/build.gradle
+++ b/src/es/monoschinos/build.gradle
@@ -5,7 +5,7 @@ ext {
     extName = 'MonosChinos'
     pkgNameSuffix = 'es.monoschinos'
     extClass = '.MonosChinos'
-    extVersionCode = 9
+    extVersionCode = 10
     libVersion = '13'
 }
 
diff --git a/src/es/monoschinos/src/eu/kanade/tachiyomi/animeextension/es/monoschinos/MonosChinos.kt b/src/es/monoschinos/src/eu/kanade/tachiyomi/animeextension/es/monoschinos/MonosChinos.kt
index b46bf10d0..fb3ee9845 100644
--- a/src/es/monoschinos/src/eu/kanade/tachiyomi/animeextension/es/monoschinos/MonosChinos.kt
+++ b/src/es/monoschinos/src/eu/kanade/tachiyomi/animeextension/es/monoschinos/MonosChinos.kt
@@ -123,12 +123,15 @@ class MonosChinos : ConfigurableAnimeSource, ParsedAnimeHttpSource() {
         } catch (e: Exception) {
             "false"
         }
-        val letterFilter = (filters.find { it is LetterFilter } as LetterFilter).state.first()
-        val letterFilter2 = if (letterFilter.isLetter()) letterFilter.uppercase() else "false"
+        val letterFilter = try {
+            (filters.find { it is LetterFilter } as LetterFilter).state.first().uppercase()
+        } catch (e: Exception) {
+            "false"
+        }
 
         return when {
             query.isNotBlank() -> GET("$baseUrl/buscar?q=$query&p=$page")
-            else -> GET("$baseUrl/animes?categoria=false&genero=${genreFilter.toUriPart()}&fecha=$yearFilter&letra=$letterFilter2&p=$page")
+            else -> GET("$baseUrl/animes?categoria=false&genero=${genreFilter.toUriPart()}&fecha=$yearFilter&letra=$letterFilter&p=$page")
         }
     }
     override fun searchAnimeFromElement(element: Element): SAnime {