diff --git a/conf/yum.conf b/conf/yum.conf
index 207695f3..284bdc66 100644
--- a/conf/yum.conf
+++ b/conf/yum.conf
@@ -61,6 +61,14 @@ gpgcheck=1
 gpgkey=https://download.opensuse.org/repositories/home:/opcm/CentOS_7/repodata/repomd.xml.key
 enabled=1
 
+[shells_fish_release_3]
+name=Fish shell - 3.x release series (CentOS_7)
+type=rpm-md
+baseurl=https://download.opensuse.org/repositories/shells:/fish:/release:/3/CentOS_7/
+gpgcheck=1
+gpgkey=https://download.opensuse.org/repositories/shells:/fish:/release:/3/CentOS_7/repodata/repomd.xml.key
+enabled=1
+
 [framework]
 name=framework
 baseurl=https://repo.geedge.net/pulp/content/7/x86_64/stable/framework/
diff --git a/tools/mk-base-image b/tools/mk-base-image
index 15b6368b..28af295f 100755
--- a/tools/mk-base-image
+++ b/tools/mk-base-image
@@ -15,7 +15,7 @@ set -ex
 
 package_to_install="@base @core @debugging @directory-client @guest-agents
                     @hardware-monitoring @network-file-system-client @performance @remote-system-management
-                    grub2 epel-release efibootmgr ansible yum-utils ipmitool docker-ce docker-ce-cli containerd.io lrzsz python3 vconfig watchdog pcm git"
+                    grub2 epel-release efibootmgr ansible yum-utils ipmitool docker-ce docker-ce-cli containerd.io lrzsz python3 vconfig watchdog pcm git tmux fish"
 
 locak_package_to_install="$projectdir/package/kernel-lt-$kernel_version.rpm
                           $projectdir/package/kernel-lt-devel-$kernel_version.rpm"