diff --git a/Dockerfile b/Dockerfile
index e5d89d8..6f935de 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,6 +9,8 @@ ENV LANG=en_US.UTF-8 LANGUAGE=en_US:en LC_ALL=en_US.UTF-8 DEBIAN_FRONTEND=nonint
 
 ARG ONLYOFFICE_VALUE=onlyoffice
 
+SHELL ["/bin/sh", "-x", "-c"]
+
 RUN echo "#!/bin/sh\nexit 0" > /usr/sbin/policy-rc.d && \
     apt-get -y update && \
     apt-get -yq install wget apt-transport-https gnupg locales lsb-release && \