diff --git a/install/usr/share/swarmlab.io/sec/swarmlab-sec b/install/usr/share/swarmlab.io/sec/swarmlab-sec
index b4ff3af..6d5277e 100755
--- a/install/usr/share/swarmlab.io/sec/swarmlab-sec
+++ b/install/usr/share/swarmlab.io/sec/swarmlab-sec
@@ -158,7 +158,6 @@ if [ -d "$Wdir/project" ]; then
 		COPY ssh/ \${SSHDIR}/
 
 		RUN export DEBIAN_FRONTEND=noninteractive  \
-                 && apk upgrade --update && apk add --no-cache octave \
 		 && rm -rf /usr/share/doc \
 		 && rm -rf /usr/share/man \
 		 && rm -rf /usr/share/locale \ 
@@ -172,7 +171,9 @@ if [ -d "$Wdir/project" ]; then
 		&& echo "StrictHostKeyChecking no" > \${SSHDIR}/config \
 		&& cat \${SSHDIR}/*.pub >> \${SSHDIR}/authorized_keys \
 		&& chmod -R 600 \${SSHDIR}/* \
-	        && chown -R \${USER1}:\${USER1} \${SSHDIR}
+	        && chown -R \${USER1}:\${USER1} \${SSHDIR} \
+		&& apk add --no-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing/ \
+       	           octave
 
 		COPY .vimrc /home/docker
 
@@ -241,7 +242,6 @@ if [ "$Wdir" ==  "$HOME" ]; then
 		ENV USER_HOME /home/docker
 
 		RUN export DEBIAN_FRONTEND=noninteractive  \
-                 && apk upgrade --update && apk add --no-cache octave \
 		 && rm -rf /usr/share/doc \
 		 && rm -rf /usr/share/man \
 		 && rm -rf /usr/share/locale \ 
@@ -255,7 +255,9 @@ if [ "$Wdir" ==  "$HOME" ]; then
 		&& echo "StrictHostKeyChecking no" > \${SSHDIR}/config \
 		&& cat \${SSHDIR}/*.pub >> \${SSHDIR}/authorized_keys \
 		&& chmod -R 600 \${SSHDIR}/* \
-	        && chown -R \${USER1}:\${USER1} \${SSHDIR}
+	        && chown -R \${USER1}:\${USER1} \${SSHDIR} \
+		&& apk add --no-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing/ \
+       	           octave
 
 		COPY .vimrc /home/docker