diff --git a/build.sh b/build.sh
index 4e9b3b1..400457a 100755
--- a/build.sh
+++ b/build.sh
@@ -2,7 +2,9 @@
 
 set -euxo pipefail
 
+rm -rf themes/book/
 git clone https://github.com/getzola/book.git themes/book/
+
 rm -rf public/
 zola build