diff --git a/main.tex b/main.tex
index 231790b..7db8d56 100644
--- a/main.tex
+++ b/main.tex
@@ -41,6 +41,9 @@
 \maxtocdepth   {subsection}
 \setlength{\parskip}{5pt}
 \usepackage{enumerate}
+\makeatletter
+  \renewcommand{\counterwithin}{\@ifstar{\@csinstar}{\@csin}}
+\makeatother
 
 \usepackage{doi}
 \usepackage{amsmath, amssymb, mathrsfs, mathtools}