diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 754bc35..6c23056 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,7 +20,7 @@ jobs:
         run: |
           git clone --depth=1 https://github.com/interscript/interscript-ruby.git ../interscript
       - name: Install parser dependency
-        run: gem install parslet
+        run: gem install parsanol
       - name: Parse all .isc files
         run: |
           cd ../interscript
diff --git a/maps/var-kor-Hang-Latn-mr-1939.isc b/maps/var-kor-Hang-Latn-mr-1939.isc
index 985f579..9a2c0dc 100644
--- a/maps/var-kor-Hang-Latn-mr-1939.isc
+++ b/maps/var-kor-Hang-Latn-mr-1939.isc
@@ -1502,8 +1502,8 @@ stage main {
   }
   sub "ᅡ" "a"
   sub "ᅣ" "ya"
-  sub "ᅥ" "ŏ"
-  sub "ᅧ" "yŏ"
+  sub "ᅥ" "ŏ"
+  sub "ᅧ" "yŏ"
   sub "ᅩ" "o"
   sub "ᅭ" "yo"
   sub "ᅮ" "u"
@@ -1518,7 +1518,7 @@ stage main {
   sub "ᅱ" "wi"
   sub "ᅴ" "ŭi"
   sub "ᅪ" "wa"
-  sub "ᅯ" "wŏ"
+  sub "ᅯ" "wŏ"
   sub "ᅫ" "wae"
   sub "ᅰ" "we"
   sub {