diff --git a/cc7-cms/Dockerfile b/cc7-cms/Dockerfile
index 7e0e8473b3ca73b32eb9c5adf3dab947b29bf80d..5b1d94003bccae89f80a6b5c149b2528d025c070 100644
--- a/cc7-cms/Dockerfile
+++ b/cc7-cms/Dockerfile
@@ -40,7 +40,7 @@ RUN     yum install -y libX11-devel libXext-devel mesa-libGLU-devel \
         yum-plugin-ovl openssl \
         glibc-devel.i686 glibc-devel \
         glibc-headers \
-        sudo && \
+        sudo nano && \
         yum clean -y all
 
 RUN     wget http://repository.egi.eu/sw/production/cas/1/current/repo-files/EGI-trustanchors.repo && \
diff --git a/slc5-cms/Dockerfile b/slc5-cms/Dockerfile
index 43733cc8f253b5524b55d33f70dcbaeae08826a3..ff35877b7fd26ee55ed61c3dae16804a27230a19 100644
--- a/slc5-cms/Dockerfile
+++ b/slc5-cms/Dockerfile
@@ -39,7 +39,7 @@ RUN     yum install -y libXft-devel libX11-devel libXpm-devel libXext-devel mesa
         voms-clients-cpp python-simplejson \
         tk mesa-libGLU mesa-libGL \
         krb5-devel cern-wrappers krb5-workstation \
-        time strace sudo && \
+        time strace sudo nano && \
         yum clean -y all
 
 RUN     wget http://repository.egi.eu/sw/production/cas/1/current/repo-files/EGI-trustanchors.repo && \
diff --git a/slc6-cms/Dockerfile b/slc6-cms/Dockerfile
index e1f4319d5461c3b3a37a4ff1a163a2a9b5a31ea2..12b7a94fde1b41f22ecab86d403162385a2c0d00 100644
--- a/slc6-cms/Dockerfile
+++ b/slc6-cms/Dockerfile
@@ -40,7 +40,7 @@ RUN     yum install -y libXft-devel libX11-devel libXpm-devel libXext-devel mesa
         CERN-CA-certs voms-clients-cpp ca-policy-lcg \
         krb5-devel cern-wrappers krb5-workstation \
         glibc-headers time \
-        strace sudo && \
+        strace sudo nano && \
         yum clean -y all
 
 RUN     wget http://repository.egi.eu/sw/production/cas/1/current/repo-files/EGI-trustanchors.repo && \