diff --git a/src/ainotes.cls b/src/ainotes.cls
index 3596456..9f9b587 100644
--- a/src/ainotes.cls
+++ b/src/ainotes.cls
@@ -6,7 +6,7 @@
 
 \usepackage{geometry}
 \usepackage{graphicx, xcolor}
-\usepackage{amsmath, amsfonts, amssymb, amsthm, mathtools, bm, upgreek, cancel, bbm, siunitx}
+\usepackage{amsmath, amsfonts, amssymb, amsthm, mathtools, bm, upgreek, cancel, bbm, siunitx, thmtools}
 \usepackage[bottom]{footmisc}
 \usepackage[pdfusetitle]{hyperref}
 \usepackage[nameinlink]{cleveref}