diff --git a/common_py/Dockerfile b/common_py/Dockerfile
index ce34bf8710846ce6d23fda351dbbf9e2f4a820b2..e05997237c40a4a305cc8ecddc421e634a78c3ba 100755
--- a/common_py/Dockerfile
+++ b/common_py/Dockerfile
@@ -4,8 +4,7 @@ FROM python:3.13-slim AS base
 ARG PIP_CACHE_DIR=
 ARG APT_CACHE_DIR=
 RUN rm -f /etc/apt/apt.conf.d/docker-clean
-RUN if ! [ -z "$APT_CACHE_DIR" ]; then echo "Dir::Cache::Archives $APT_CACHE_DIR" >>  /etc/apt/apt.conf.d/ci_caching; fi
-
+RUN if ! [ -z "$APT_CACHE_DIR" ]; then echo "Dir::Cache::Archives $APT_CACHE_DIR" > /etc/apt/apt.conf.d/ci_caching; fi
 
 WORKDIR /code
 
diff --git a/job_controller/jobs/ffmpeg_base/Dockerfile b/job_controller/jobs/ffmpeg_base/Dockerfile
index afc4bd6f3c28edadd7035689ff3ad1360ba692ef..207aec9fd48b2a25980203145290086ddc077114 100644
--- a/job_controller/jobs/ffmpeg_base/Dockerfile
+++ b/job_controller/jobs/ffmpeg_base/Dockerfile
@@ -8,7 +8,7 @@ FROM registry.git.fsmpi.rwth-aachen.de/videoag/backend/${ENV_TYPE}_job_base:${GI
 # READ THE NOTE on caching in the README before changing this/for more info!
 ARG APT_CACHE_DIR=
 RUN rm -f /etc/apt/apt.conf.d/docker-clean
-RUN if ! [ -z "$APT_CACHE_DIR" ]; then echo "Dir::Cache::Archives $APT_CACHE_DIR" >>  /etc/apt/apt.conf.d/ci_caching; fi
+RUN if ! [ -z "$APT_CACHE_DIR" ]; then echo "Dir::Cache::Archives $APT_CACHE_DIR" > /etc/apt/apt.conf.d/ci_caching; fi
 
 RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \