diff --git a/main.tex b/main.tex
index 7120e39..cdc6277 100644
--- a/main.tex
+++ b/main.tex
@@ -6,7 +6,8 @@
 \usefonttheme{professionalfonts}
 
 \usepackage{algo}
-\usetheme{moloch}   % new metropolis
+\usetheme[block=fill]{moloch}   % new metropolis
+\setbeamercolor{block title}{bg=mDarkTeal!15}
 % fonts
 \usepackage[defaultsans]{lato}
 \usepackage{lete-sans-math}