diff --git a/ipa_xsampa.schema.yaml b/ipa_xsampa.schema.yaml
index beaa79b..966c6cf 100644
--- a/ipa_xsampa.schema.yaml
+++ b/ipa_xsampa.schema.yaml
@@ -12,20 +12,13 @@ schema:
     IPA input method in X-SAMPA.
     http://en.wikipedia.org/wiki/X-SAMPA
 
-switches:
-  - name: ascii_mode
-    reset: 0
-    states: [ 中文, 西文 ]
-
 engine:
   processors:
-    - ascii_composer
     - speller
     - selector
     - navigator
     - express_editor
   segmentors:
-    - ascii_segmentor
     - abc_segmentor
     - fallback_segmentor
   translators: