diff --git a/docker/matrix-eavesdrop/Dockerfile b/docker/matrix-eavesdrop/Dockerfile
index 52cee9a7e5..92cc5e48c4 100644
--- a/docker/matrix-eavesdrop/Dockerfile
+++ b/docker/matrix-eavesdrop/Dockerfile
@@ -14,13 +14,11 @@
 # limitations under the License.
 
 FROM docker.io/opendevorg/python-builder:3.9 as builder
-RUN echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list
 
 COPY src /tmp/src
 RUN assemble
 
 FROM docker.io/opendevorg/python-base:3.9 as eavesdrop
-RUN echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list
 
 COPY --from=builder /output/ /output
 RUN /output/install-from-bindep \
diff --git a/docker/matrix-eavesdrop/src/bindep.txt b/docker/matrix-eavesdrop/src/bindep.txt
index 16b91ae828..e65b421f3f 100644
--- a/docker/matrix-eavesdrop/src/bindep.txt
+++ b/docker/matrix-eavesdrop/src/bindep.txt
@@ -1,7 +1,7 @@
 gcc [compile test]
 libc6-dev [compile test]
 libffi-dev [compile test]
-libolm-dev/buster-backports [compile test]
+libolm-dev [compile test]
 make [compile test]
 python3-dev [compile test]
-libolm3/buster-backports
+libolm3