diff --git a/src/core.sty b/src/core.sty
index 8253eb4..166e9d4 100644
--- a/src/core.sty
+++ b/src/core.sty
@@ -30,6 +30,7 @@
 \RequirePackage{titlesec}
 \RequirePackage{centernot}
 \RequirePackage{todonotes}
+\RequirePackage{bm}
 
 \newcounter{descriptorShadeStrength}
 \newcounter{shadeStrength}