diff --git a/README.md b/README.md
index 8bcc8e3..3bdc8a6 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,7 @@ pipeline:
     secure: true (default) | false # true = use FTP(S), false = FTP without SSL
     verify: true (default) | false # true = strong SSL verification, false = supress SSL verification error
     chmod: true (default) | false # true = chmod after file transferred, false = no chmod after file transferred
+    clean_dir: true | false (default) # true = clean destination directory before transferring files, false = don't clean
     dest_dir: /var/www/mysite
     src_dir: /mysite/static
     exclude:
diff --git a/upload.sh b/upload.sh
index 8409aab..f16fd66 100755
--- a/upload.sh
+++ b/upload.sh
@@ -26,14 +26,16 @@ if [ -z "$PLUGIN_SRC_DIR" ]; then
     PLUGIN_SRC_DIR="/"
 fi
 
-if [ -z "$PLUGIN_CHMOD" ]; then
-    PLUGIN_CHMOD=""
+if [ "$PLUGIN_CHMOD" = false ]; then
+    PLUGIN_CHMOD="-p"
 else
-    if [ "$PLUGIN_CHMOD" = true ]; then
-        PLUGIN_CHMOD=""
-    else
-        PLUGIN_CHMOD="-p"
-    fi
+    PLUGIN_CHMOD=""
+fi
+
+if [ "$PLUGIN_CLEAN_DIR" = true ]; then
+    PLUGIN_CLEAN_DIR="rm -r $PLUGIN_DEST_DIR"
+else
+    PLUGIN_CLEAN_DIR=""
 fi
 
 PLUGIN_EXCLUDE_STR=""
@@ -54,5 +56,6 @@ lftp -e "set xfer:log 1; \
   set ftp:ssl-protect-data $PLUGIN_SECURE; \
   set ssl:verify-certificate $PLUGIN_VERIFY; \
   set ssl:check-hostname $PLUGIN_VERIFY; \
+  $PLUGIN_CLEAN_DIR; \
   mirror --verbose $PLUGIN_CHMOD -R $PLUGIN_INCLUDE_STR $PLUGIN_EXCLUDE_STR $(pwd)$PLUGIN_SRC_DIR $PLUGIN_DEST_DIR" \
   -u $FTP_USERNAME,$FTP_PASSWORD $PLUGIN_HOSTNAME