diff --git a/exercise/main.tex b/exercise/main.tex
index 7da18f3..09b7352 100644
--- a/exercise/main.tex
+++ b/exercise/main.tex
@@ -1,4 +1,4 @@
-\documentclass[]{../course_template/exerciseClass}
+\documentclass[solution]{../course_template/exerciseClass}
 \title{Power Electronics}
 
 \includeonly{tex/exercise05}