diff --git a/double_pinyin.schema.yaml b/double_pinyin.schema.yaml
index 13452a2..96418ba 100644
--- a/double_pinyin.schema.yaml
+++ b/double_pinyin.schema.yaml
@@ -107,7 +107,7 @@ reduce_english_filter:
   dal, dit, dub, dug, fab, gam, ger, gus, hem, hep, hud, kat, lam, lax, lex, lug,
   lux, moc, mos, mot, mum, nad, nay, nib, nip, pak, pap, pax, rig, rum, sac, sal,
   sax, sec, shin, sis, ska, slang, sus, tad, taj, tac, tic, yep, yum, fax, cain,
-  key, mob, buy, dam, wap, yes, but, put, lag]
+  key, mob, buy, dam, wap, yes, but, put, lag, buf]
 
 
 # 引入八股文
diff --git a/double_pinyin_flypy.schema.yaml b/double_pinyin_flypy.schema.yaml
index f6af05b..032cbfe 100644
--- a/double_pinyin_flypy.schema.yaml
+++ b/double_pinyin_flypy.schema.yaml
@@ -107,7 +107,7 @@ reduce_english_filter:
   dal, dit, dub, dug, fab, gam, ger, gus, hem, hep, hud, kat, lam, lax, lex, lug,
   lux, moc, mos, mot, mum, nad, nay, nib, nip, pak, pap, pax, rig, rum, sac, sal,
   sax, sec, shin, sis, ska, slang, sus, tad, taj, tac, tic, yep, yum, fax, cain,
-  key, mob, buy, dam, wap, yes, but, put, lag]
+  key, mob, buy, dam, wap, yes, but, put, lag, buf]
 
 
 # 引入八股文
diff --git a/double_pinyin_mspy.schema.yaml b/double_pinyin_mspy.schema.yaml
index cdfbb99..da91b90 100644
--- a/double_pinyin_mspy.schema.yaml
+++ b/double_pinyin_mspy.schema.yaml
@@ -107,7 +107,7 @@ reduce_english_filter:
   dal, dit, dub, dug, fab, gam, ger, gus, hem, hep, hud, kat, lam, lax, lex, lug,
   lux, moc, mos, mot, mum, nad, nay, nib, nip, pak, pap, pax, rig, rum, sac, sal,
   sax, sec, shin, sis, ska, slang, sus, tad, taj, tac, tic, yep, yum, fax, cain,
-  key, mob, buy, dam, wap, yes, but, put, lag]
+  key, mob, buy, dam, wap, yes, but, put, lag, buf]
 
 
 # 引入八股文
diff --git a/double_pinyin_ziguang.schema.yaml b/double_pinyin_ziguang.schema.yaml
index 15cadb0..e67b333 100644
--- a/double_pinyin_ziguang.schema.yaml
+++ b/double_pinyin_ziguang.schema.yaml
@@ -107,7 +107,7 @@ reduce_english_filter:
   dal, dit, dub, dug, fab, gam, ger, gus, hem, hep, hud, kat, lam, lax, lex, lug,
   lux, moc, mos, mot, mum, nad, nay, nib, nip, pak, pap, pax, rig, rum, sac, sal,
   sax, sec, shin, sis, ska, slang, sus, tad, taj, tac, tic, yep, yum, fax, cain,
-  key, mob, buy, dam, wap, yes, but, put, lag]
+  key, mob, buy, dam, wap, yes, but, put, lag, buf]
 
 
 # 引入八股文
diff --git a/rime_ice.schema.yaml b/rime_ice.schema.yaml
index 8942968..d305759 100644
--- a/rime_ice.schema.yaml
+++ b/rime_ice.schema.yaml
@@ -106,7 +106,7 @@ reduce_english_filter:
   dal, dit, dub, dug, fab, gam, ger, gus, hem, hep, hud, kat, lam, lax, lex, lug,
   lux, moc, mos, mot, mum, nad, nay, nib, nip, pak, pap, pax, rig, rum, sac, sal,
   sax, sec, shin, sis, ska, slang, sus, tad, taj, tac, tic, yep, yum, fax, cain,
-  key, mob, buy, dam, wap, yes, but, put, lag]
+  key, mob, buy, dam, wap, yes, but, put, lag, buf]
 
 
 # 引入八股文