diff --git a/beamerthememum.sty b/beamerthememum.sty
index 9ef244b..8c15ac8 100644
--- a/beamerthememum.sty
+++ b/beamerthememum.sty
@@ -16,5 +16,7 @@
 \setbeamerfont{title}{size={\huge},family={\bfseries}}
 \setbeamerfont{subtitle}{size={\LARGE}, family={\mdseries}}
 \setbeamerfont{author}{size={\large}}
+\usefonttheme[onlymath]{serif}
+\usefonttheme{professionalfonts}
 \mode<all>