diff --git a/lib/container-upgrade.bash b/lib/container-upgrade.bash
new file mode 100644
index 0000000..79fccdc
--- /dev/null
+++ b/lib/container-upgrade.bash
@@ -0,0 +1,14 @@
+function upgrade {
+  local container_version host_version
+  container_version=$(</var/lib/miaou-bash/semver_current)
+  host_version=$(<"$MIAOU_BASH_DIR"/.semver_git_tag)
+  if [[ "$container_version" != "$host_version" ]]; then
+    echo -n "MIAOU-BASH: initiate new version: $host_version"
+    [[ "$UID" -ne 0 ]] && echo " (CTRL+c to bypass)" || echo
+    sudo -E miaou-bash "$MIAOU_BASH_DIR"/lib/initiate.bash
+  fi
+}
+
+if [[ -f /var/lib/miaou-bash/semver_current ]]; then
+  upgrade
+fi
diff --git a/lib/devmode.bash b/lib/devmode.bash
index 7f6c35b..44a8905 100644
--- a/lib/devmode.bash
+++ b/lib/devmode.bash
@@ -1,5 +1,3 @@
-#!/usr/bin/env miaou-bash
-
 # Constants
 
 GIT_URL=git@git.artcode.re:miaou/miaou-bash.git
diff --git a/lib/initiate.bash b/lib/initiate.bash
index 92deb2d..55a8717 100644
--- a/lib/initiate.bash
+++ b/lib/initiate.bash
@@ -1,5 +1,3 @@
-#!/usr/bin/env miaou-bash
-
 # CONSTANTS
 
 readonly AZERTY_ZONES=(
diff --git a/lib/self-upgrade.bash b/lib/self-upgrade.bash
index 882b834..482dc2a 100644
--- a/lib/self-upgrade.bash
+++ b/lib/self-upgrade.bash
@@ -1,18 +1,11 @@
-#!/usr/bin/env miaou-bash
-
 # CONSTANTS
 
 INSTALL_URL='https://git.artcode.re/miaou/miaou-bash/raw/branch/main/install.sh'
 
 # FUNCTIONS
 
-function hosted_upgrade {
-  cat >&2 <<EOF
-FAILURE:
-You are running inside a container within the HOSTED miaou mode.
-Perform the same action again underneath HOST machine!
-EOF
-  builtin exit 10
+function container_upgrade {
+  . "$MIAOU_BASH_DIR"/lib/container-upgrade.bash
 }
 
 function development_upgrade {
@@ -74,7 +67,7 @@ function perform_upgrade {
 source "$MIAOU_BASH_DIR"/lib/functions.bash
 fetch_mode
 case "$MIAOU_BASH_MODE" in
-hosted) hosted_upgrade ;;
+hosted) container_upgrade ;;
 development) development_upgrade ;;
 system) system_upgrade ;;
 esac
diff --git a/lib/uninstall.bash b/lib/uninstall.bash
index b590204..be533b6 100644
--- a/lib/uninstall.bash
+++ b/lib/uninstall.bash
@@ -1,5 +1,3 @@
-#!/usr/bin/env miaou-bash
-
 # Constants
 
 BACKUP_SUFFIX='.ORIGINAL'