diff --git a/update.sh b/update.sh
index d488c4784..6d9f8dd7e 100755
--- a/update.sh
+++ b/update.sh
@@ -694,7 +694,15 @@ migrate_solr_config_options() {
       echo "Once you decided on removing the volume simply run docker volume rm $solr_volume to remove it manually."
       echo "This can be done anytime. mailcow does not use this volume anymore."
     fi
-  fi  
+  fi
+
+  # Delete old fts.conf before forced switch to flatcurve to ensure update is working properly
+  FTS_CONF_PATH="data/conf/dovecot/conf.d/fts.conf"
+  if [[ -f "$FTS_CONF_PATH" ]]; then
+    if grep -q "Autogenerated by mailcow" "$FTS_CONF_PATH"; then
+      rm -rf $FTS_CONF_PATH
+    fi
+  fi
 }
 
 ############## End Function Section ##############