diff --git a/Dockerfile.buster b/Dockerfile.buster
index f973e24d657366f60068c8547f6cc13a280a300c..acc8fa9d114469c04162a51ac52781d057ef548f 100644
--- a/Dockerfile.buster
+++ b/Dockerfile.buster
@@ -7,7 +7,7 @@ RUN apt-get -qq update && \
         sqlite3 locales-all git \
         python3 python3-venv python3-coverage python3-ldap3 python3-flask python3-flask-sqlalchemy python3-flask-migrate \
         python3-pip python3-qrcode python3-fido2 python3-oauthlib python3-flask-babel python3-pytest python3-all python3-pip \
-        git-buildpackage debhelper dh-python mariadb-server python3-mysqldb && \
+        git-buildpackage debhelper dh-python mariadb-server python3-mysqldb python3-flask-oauthlib && \
     pip3 install pylint html5validator twine build --upgrade && \
     apt-get -qq clean