diff --git a/Dockerfile b/Dockerfile
index 21a7b51..18aa21f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,7 +34,7 @@ RUN dpkg -i /tmp/prosody.deb \
     && perl -i -pe 'BEGIN{undef $/;} s/^log = {.*?^}$/log = {\n    {levels = {min = "info"}, to = "console"};\n}/smg' /etc/prosody/prosody.cfg.lua
 
 COPY ./entrypoint.sh /entrypoint.sh
-RUN chmod +x /entrypoint.sh
+RUN chmod 755 /entrypoint.sh
 ENTRYPOINT ["/entrypoint.sh"]
 
 EXPOSE 80 443 5222 5269 5347 5280 5281