diff --git a/index.ts b/index.ts
index dd88986..c84112f 100644
--- a/index.ts
+++ b/index.ts
@@ -1,4 +1,4 @@
-const version = "2.4.2";
+const version = "2.4.3";
 import x2i from "./x2i";
 import { existsSync } from "fs";
 
diff --git a/x2i/dictionaries/hi-keys.yaml b/x2i/dictionaries/hi-keys.yaml
index 1091369..f73bac5 100644
--- a/x2i/dictionaries/hi-keys.yaml
+++ b/x2i/dictionaries/hi-keys.yaml
@@ -4,6 +4,34 @@
   - "n'"
   - "ん"
 
+# hepburn long vowels
+- raw:
+  - "[āâ]"
+  - "aa"
+- raw:
+  - "[ūû]"
+  - "uu"
+- raw:
+  - "[ūû]"
+  - "uu"
+- raw:
+  - "[ēê]"
+  - "ee"
+- raw:
+  - "[ōô]"
+  - "oo"
+
+# youon souken 5-letter
+- raw:
+  - "cchya"
+  - "っちゃ"
+- raw:
+  - "cchyu"
+  - "っちゅ"
+- raw:
+  - "cchuo"
+  - "っちょ"
+
 # gojuuonzu smol 4-letter
 - raw:
   - "[xl]tsu"
@@ -12,6 +40,9 @@
 - raw:
   - "chya"
   - "ちゃ"
+- raw:
+  - "chyu"
+  - "ちゅ"
 # gojuuonzu souken 4-letter
 - raw:
   - "sshi"
@@ -638,17 +669,3 @@
 - raw:
   - "n"
   - "ん"
-# long vowel 1-letter hepburn
-# NOT GOOD
-#- raw:
-#  - "ā|â"
-#  - "ああ"
-#- raw:
-#  - "ū|û"
-#  - "うう"
-#- raw:
-#  - "ē|ê"
-#  - "ええ"
-#- raw:
-#  - "ō|ô"
-#  - "おお"