diff --git a/Dockerfile b/Dockerfile
index 5feeaf77dcfe6..20858fbcc19a5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,8 +8,6 @@ FROM docker.io/library/golang:1.26.4@sha256:d184d9be4c13614e28498d632eeaaac704d6
 
 WORKDIR /tmp
 
-RUN echo 'deb http://archive.debian.org/debian buster-backports main' >> /etc/apt/sources.list
-
 RUN apt-get update && apt-get install --no-install-recommends -y \
     openssh-server \
     nginx \
diff --git a/Dockerfile.tilt b/Dockerfile.tilt
index 310a9782e86c7..169e1d224da06 100644
--- a/Dockerfile.tilt
+++ b/Dockerfile.tilt
@@ -2,8 +2,6 @@ FROM docker.io/library/golang:1.26.4@sha256:d184d9be4c13614e28498d632eeaaac704d6
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-RUN echo 'deb http://archive.debian.org/debian buster-backports main' >> /etc/apt/sources.list
-
 RUN apt-get update && apt-get install --no-install-recommends -y \
     curl \
     openssh-server \