diff --git a/latex/thesis.cls b/latex/thesis.cls
index 429a06f..bc23b83 100644
--- a/latex/thesis.cls
+++ b/latex/thesis.cls
@@ -83,6 +83,9 @@
 \renewcommand{\cftchapleader}{\normalfont\cftdotfill{\cftsecdotsep}}
 \renewcommand{\cftchappagefont}{\normalfont}
 
+% Ensure TOC and References Respect Custom Numbering
+\renewcommand{\thechapter}{chapter.\Roman{chapter}}
+
 % Table of Contents (TOC) Title styling
 \renewcommand{\contentsname}{DAFTAR ISI}
 \renewcommand{\cfttoctitlefont}{\bfseries\MakeUppercase}