diff --git a/source/common/utils.cpp b/source/common/utils.cpp
index bbf2a0d..9497d3c 100644
--- a/source/common/utils.cpp
+++ b/source/common/utils.cpp
@@ -579,14 +579,12 @@ std::string boolToString(bool value)
 // Convierte una cadena a minusculas
 std::string toLower(std::string str)
 {
-    return str;
-    
     const char *original = str.c_str();
     char *lower = (char *)malloc(str.size() + 1);
     for (int i = 0; i < str.size(); ++i)
     {
         char c = original[i];
-        lower[i] = (c >= 65 || c <= 90) ? c + 32 : c;
+        lower[i] = (c >= 65 && c <= 90) ? c + 32 : c;
     }
     lower[str.size()] = 0;
     std::string nova(lower);