diff --git a/monujo/lib/common b/monujo/lib/common
index 9b4048e..1ef0efb 100644
--- a/monujo/lib/common
+++ b/monujo/lib/common
@@ -1,11 +1,11 @@
-
+# -*- mode: shell-script -*-
 
 APP_NAME=monujo
 SOURCE_URL="https://docker.0k.io/downloads"
 LOCATION="$SERVICE_CONFIGSTORE/opt/apps/$APP_NAME"
 CONFIGFILE="$LOCATION/config.json"
 
-version_gt() { test "$(printf '%s\n' "$@" | sort -V | head -n 1)" != "$1"; }
+version_gt() { test "$(semver "$@" | head -n 1)" != "$1"; }
 
 
 monujo:get_source_url() {
@@ -35,11 +35,14 @@ monujo:code_init() {
         fi
     fi
     if [ -d "$LOCATION" ]; then
-        find "$LOCATION" -mindepth 1 -delete
+        find "$LOCATION" -mindepth 1 -delete || return 1
     else
-        mkdir -p "$LOCATION"
+        mkdir -p "$LOCATION" || return 1
     fi
-    cd "$LOCATION"
+    cd "$LOCATION" || {
+        err "Couldn't cd to '$LOCATION'."
+        return 1
+    }
     source_url="$(monujo:get_source_url "$APP_NAME" "$version")"
     info "Downloading '$source_url'."
     wget -q "$source_url" -O file.tar.bz2 || {