diff --git a/Containers/imaginary/Dockerfile b/Containers/imaginary/Dockerfile
index ecebefbf..b27ec131 100644
--- a/Containers/imaginary/Dockerfile
+++ b/Containers/imaginary/Dockerfile
@@ -4,17 +4,19 @@ FROM nextcloud/imaginary:20230301
 USER root
 RUN set -ex; \
     \
-    echo "deb http://deb.debian.org/debian bookworm main" > /etc/apt/sources.list.d/bookworm.list \
     apt-get update; \
     apt-get install -y --no-install-recommends \
         netcat \
     ; \
+    echo "deb http://deb.debian.org/debian bookworm main" > /etc/apt/sources.list.d/bookworm.list \
+    apt-get update; \
     apt-get install -t bookworm -y --no-install-recommends \
         libheif1 \
         libde265-0 \
         libx265-199 \
         libvips \
     ; \
+    rm /etc/apt/sources.list.d/bookworm.list; \
     rm -rf /var/lib/apt/lists/*
 USER nobody