diff --git a/src/master/Dockerfile b/src/master/Dockerfile
index b855115..7e43fbe 100644
--- a/src/master/Dockerfile
+++ b/src/master/Dockerfile
@@ -36,11 +36,12 @@ RUN if [[ "$USE_INTRANET" == "true" ]]; then \
         if [[ -f /etc/apt/sources.list ]]; then cp /etc/apt/sources.list /etc/apt/sources.list.bak; fi && \
         mkdir -p /etc/apt && \
         echo "deb [trusted=yes] http://10.68.64.1/ubuntu2204/ jammy main" > /etc/apt/sources.list && \
+        rm -rf /etc/apt/sources.list.d && \
         echo 'Acquire::https::Verify-Peer "false";' > /etc/apt/apt.conf.d/99disable-ssl-check && \
         echo 'Acquire::https::Verify-Host "false";' >> /etc/apt/apt.conf.d/99disable-ssl-check; \
     fi && \
     apt-get update && \
-    apt-get install -y supervisor net-tools inetutils-ping vim && \
+    apt-get install -y supervisor net-tools inetutils-ping && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*