diff --git a/Dockerfiles/web-service/ubuntu/Dockerfile b/Dockerfiles/web-service/ubuntu/Dockerfile
index c36b4312e..962d2a38d 100644
--- a/Dockerfiles/web-service/ubuntu/Dockerfile
+++ b/Dockerfiles/web-service/ubuntu/Dockerfile
@@ -45,9 +45,9 @@ RUN set -eux && \
     apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 648ACFD622F3D138 && \
     apt-key adv --keyserver keyserver.ubuntu.com --recv-keys AA8E81B4331F7F50 && \
     apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 112695A0E562B32A && \
-    echo "deb http://deb.debian.org/debian buster main" > /etc/apt/sources.list.d/debian.list && \
-    echo "deb http://deb.debian.org/debian buster-updates main" >> /etc/apt/sources.list.d/debian.list && \
-    echo "deb http://deb.debian.org/debian-security buster/updates main" >> /etc/apt/sources.list.d/debian.list && \
+    echo "deb http://deb.debian.org/debian bullseye main" > /etc/apt/sources.list.d/debian.list && \
+    echo "deb http://deb.debian.org/debian bullseye-updates main" >> /etc/apt/sources.list.d/debian.list && \
+#    echo "deb http://deb.debian.org/debian-security bullseye/updates main" >> /etc/apt/sources.list.d/debian.list && \
     apt-get -y update && \
     DEBIAN_FRONTEND=noninteractive apt-get -y \
             --no-install-recommends install \