diff --git a/Dockerfile b/Dockerfile
index 1c2b712..ff51798 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,6 +15,8 @@ WORKDIR /app
 
 # Install git, exiftool
 
+RUN apt update
+RUN apt install -y software-properties-common
 RUN add-apt-repository ppa:apt-fast/stable
 RUN apt install -y apt-fast
 RUN apt update
diff --git a/src/api/src/create_book.py b/src/api/src/create_book.py
index 50961e9..dc9cf14 100644
--- a/src/api/src/create_book.py
+++ b/src/api/src/create_book.py
@@ -709,7 +709,7 @@ id="copyright-license-image">""".format(
         # # Cover and Copyright Page
         await self.generate_cover_and_copyright_html()
         await self.generate_about_author_chapter()
-        self.tree = BeautifulSoup(self.template)
+        self.tree = BeautifulSoup(self.template, "lxml")
 
         self.generate_toc()
         for part, content in zip(self.data["parts"], contents):