diff --git a/maven-plugin/src/main/resources/build-distro/Dockerfile-jre7 b/maven-plugin/src/main/resources/build-distro/Dockerfile-jre7
index 071308c5..52372e33 100644
--- a/maven-plugin/src/main/resources/build-distro/Dockerfile-jre7
+++ b/maven-plugin/src/main/resources/build-distro/Dockerfile-jre7
@@ -9,7 +9,7 @@ COPY setenv.sh /usr/local/tomcat/bin/setenv.sh
 COPY wait-for-it.sh /usr/local/tomcat/wait-for-it.sh
 COPY startup.sh /usr/local/tomcat/startup.sh
 
-RUN sed '/Connector port="8080"/ URIEncoding="UTF-8"' /usr/local/tomcat/conf/server.xml
+RUN sed -i '/Connector port="8080"/a URIEncoding="UTF-8"' /usr/local/tomcat/conf/server.xml
 
 RUN chmod +x /usr/local/tomcat/wait-for-it.sh
 RUN chmod +x /usr/local/tomcat/startup.sh
\ No newline at end of file
diff --git a/maven-plugin/src/main/resources/build-distro/Dockerfile-jre8 b/maven-plugin/src/main/resources/build-distro/Dockerfile-jre8
index 84316e24..d171c1d9 100644
--- a/maven-plugin/src/main/resources/build-distro/Dockerfile-jre8
+++ b/maven-plugin/src/main/resources/build-distro/Dockerfile-jre8
@@ -9,7 +9,7 @@ COPY setenv.sh /usr/local/tomcat/bin/setenv.sh
 COPY wait-for-it.sh /usr/local/tomcat/wait-for-it.sh
 COPY startup.sh /usr/local/tomcat/startup.sh
 
-RUN sed '/Connector port="8080"/ URIEncoding="UTF-8"' /usr/local/tomcat/conf/server.xml
+RUN sed -i '/Connector port="8080"/a URIEncoding="UTF-8"' /usr/local/tomcat/conf/server.xml
 
 RUN chmod +x /usr/local/tomcat/wait-for-it.sh
 RUN chmod +x /usr/local/tomcat/startup.sh
\ No newline at end of file