diff --git a/source/jail_engine/utils.cpp b/source/jail_engine/utils.cpp
index 4c6f26d..bfca79b 100644
--- a/source/jail_engine/utils.cpp
+++ b/source/jail_engine/utils.cpp
@@ -566,7 +566,23 @@ std::string toLower(std::string str)
         lower[i] = (c >= 65 && c <= 90) ? c + 32 : c;
     }
     lower[str.size()] = 0;
-    std::string nova(lower);
+    std::string result(lower);
     free(lower);
-    return nova;
+    return result;
+}
+
+// Convierte una cadena a mayúsculas
+std::string toUpper(std::string str)
+{
+    const char *original = str.c_str();
+    char *upper = (char *)malloc(str.size() + 1);
+    for (int i = 0; i < (int)str.size(); ++i)
+    {
+        char c = original[i];
+        upper[i] = (c >= 97 && c <= 122) ? c - 32 : c;
+    }
+    upper[str.size()] = 0;
+    std::string result(upper);
+    free(upper);
+    return result;
 }
\ No newline at end of file
diff --git a/source/jail_engine/utils.h b/source/jail_engine/utils.h
index 7dfa0de..60f2136 100644
--- a/source/jail_engine/utils.h
+++ b/source/jail_engine/utils.h
@@ -200,4 +200,7 @@ bool colorAreEqual(color_t color1, color_t color2);
 // Convierte una cadena a minusculas
 std::string toLower(std::string str);
 
+// Convierte una cadena a mayúsculas
+std::string toUpper(std::string str);
+
 #endif
\ No newline at end of file
diff --git a/source/title.cpp b/source/title.cpp
index 4a00585..6967348 100644
--- a/source/title.cpp
+++ b/source/title.cpp
@@ -440,7 +440,7 @@ void Title::createCheevosTexture()
 	SDL_RenderClear(renderer);
 
 	// Escribe la lista de logros en la textura
-	const std::string cheevosOwner = options->online.jailerID == "" ? "LOCAL ACHIEVEMENTS" : "ACHIEVEMENTS FOR " + options->online.jailerID;
+	const std::string cheevosOwner = options->online.jailerID == "" ? "LOCAL ACHIEVEMENTS" : "ACHIEVEMENTS FOR " + toUpper(options->online.jailerID);
 	const std::string cheevosListCaption = cheevosOwner + " (" + std::to_string(cheevos->unlocked()) + " / " + std::to_string(cheevos->count()) + ")";
 	infoText->writeDX(TXT_CENTER | TXT_COLOR, cheevosTexture->getWidth() / 2, 2, cheevosListCaption, 1, stringToColor(options->palette, "bright_green"));
 	int pos = 11;