diff --git a/src/Tools/psxcdgen_ex/src/types/mod.rs b/src/Tools/psxcdgen_ex/src/types/mod.rs
index edf425bf..fb8aa44a 100644
--- a/src/Tools/psxcdgen_ex/src/types/mod.rs
+++ b/src/Tools/psxcdgen_ex/src/types/mod.rs
@@ -47,8 +47,9 @@ pub struct DirectoryName {
 }
 
 impl DirectoryName {
-    pub fn from_str(str: &str) -> Result<DirectoryName, Error> {
-        Ok(DirectoryName{name: DString::from_str(str)?})
+    pub fn from_str(dir_name: &str) -> Result<DirectoryName, Error> {
+        let dir_name = dir_name.to_uppercase();
+        Ok(DirectoryName{name: DString::from_str(dir_name.as_ref())?})
     }
 }
 
@@ -59,6 +60,7 @@ pub struct FileName {
 
 impl FileName {
     pub fn from_str(file_name: &str) -> Result<FileName, Error> {
+        let file_name = file_name.to_uppercase();
         let (name, ext) = {
             let mut sub_str = file_name.split('.');
             (Error::ok_or_new(sub_str.next(), || "File name can't be emplty".to_owned())?, sub_str.next())
@@ -82,4 +84,4 @@ impl Default for Properties {
     fn default() -> Self {
         Properties{lba: None, length: None}
     }
-}
\ No newline at end of file
+}