diff --git a/Dockerfile b/Dockerfile
index d4dd876..99d3623 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,15 +18,20 @@ RUN apt-get update -y && \
     rm -rf /var/lib/apt/lists/*
 
 RUN useradd -md /app -s /bin/bash bot
-RUN cd /app && git clone https://github.com/novnc/noVNC.git && \
-    cd noVNC/ && cp vnc_lite.html index.html && sed -i -e 's/<title>noVNC<\/title>/<title>Wohnungsbot<\/title>\n\n    <link rel="icon" type="image\/x-icon" href="favicon.ico">/' -e "s/document\.getElementById('sendCtrlAltDelButton')//" -e 's/\.onclick = sendCtrlAltDel\;//' -e 's/<div id="sendCtrlAltDelButton">Send CtrlAltDel<\/div>//' index.html && \
-    cd utils && git clone https://github.com/novnc/websockify websockify && \
-    mkdir /data && mkdir /app/.config && ln -s /data /app/.config/Wohnungsbot
+
 ADD startup.sh /app/startup.sh
+ADD replacements.sed /app/replacements.sed
 ADD openbox/* /app/.config/openbox/
+
+RUN cd /app && git clone https://github.com/novnc/noVNC.git && \
+    cd noVNC/ && cp vnc_lite.html index.html && chmod +x /app/replacements.sed && /app/replacements.sed -i index.html && \
+    cd utils && git clone https://github.com/novnc/websockify websockify && \
+    mkdir /data && ln -s /data /app/.config/Wohnungsbot
+
 COPY --from=builder /root/wohnungsbot/release/Wohnungsbot-$WB_VERSION.AppImage /app/Wohnungsbot.AppImage
 COPY --from=builder /root/wohnungsbot/resources/icon.ico /app/noVNC/favicon.ico
 COPY --from=builder /root/wohnungsbot/resources/icons/512x512.png /app/background.png
+
 RUN chmod 0755 /app/startup.sh && chown -R bot /app && chown -R bot /data
 
 HEALTHCHECK CMD pidof Wohnungsbot.AppImage && curl --fail http://localhost:6080/ || exit 1
diff --git a/replacements.sed b/replacements.sed
new file mode 100644
index 0000000..a1a5fb1
--- /dev/null
+++ b/replacements.sed
@@ -0,0 +1,8 @@
+#!/bin/sed -f
+
+# Remove CtrlAltDelButton
+/getElementById('sendCtrlAltDelButton')/,+1d
+/<div id="sendCtrlAltDelButton.*$/d
+
+# Replace window title, append favicon
+s/\(<title>\)noVNC/\1Wohnungsbot/;T;a <link rel="icon" type="image\/x-icon" href="favicon.ico">
\ No newline at end of file