diff --git a/package.json b/package.json
index 0314773aa..bc2109cad 100644
--- a/package.json
+++ b/package.json
@@ -141,7 +141,7 @@
     "textlint-rule-abbr-within-parentheses": "^1.0.2",
     "textlint-rule-apostrophe": "^2.0.0",
     "textlint-rule-common-misspellings": "^1.0.1",
-    "textlint-rule-diacritics": "^1.0.0",
+    "textlint-rule-diacritics": "^2.0.0",
     "textlint-rule-en-capitalization": "^2.0.3",
     "textlint-rule-max-comma": "^4.0.0",
     "textlint-rule-max-doc-width": "^1.4.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 4da3ed636..47dfc5c3a 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -190,8 +190,8 @@ importers:
         specifier: ^1.0.1
         version: 1.0.1
       textlint-rule-diacritics:
-        specifier: ^1.0.0
-        version: 1.0.0
+        specifier: ^2.0.0
+        version: 2.1.4(textlint@12.6.1)
       textlint-rule-en-capitalization:
         specifier: ^2.0.3
         version: 2.0.3
@@ -6444,8 +6444,8 @@ packages:
     resolution: {integrity: sha512-MqIQVVkz+uGEHi3TsHx/czcxxCbRIL7sv5K5DnYw/tI+apY54IbPefV/cmgxp6LoJSEx/TqcHdLs/298afG5QQ==}
     engines: {node: '>=6'}
 
-  match-casing@1.0.3:
-    resolution: {integrity: sha512-oMyC3vUVCFbGu+M2Zxl212LPJThcaw7QxB5lFuJPQCgV/dsGBP0yZeCoLmX6CiBkoBcVbAKDJZrBpJVu0XcLMw==}
+  match-casing@2.0.1:
+    resolution: {integrity: sha512-LeCq9FI5u4nppJnt4hklxcchkH9qH9+uFjX17f74a99lLkRXfVE49iL0hCtM5DZolps483viAy5zjvlTz/JNoA==}
 
   match-index@1.0.3:
     resolution: {integrity: sha512-1XjyBWqCvEFFUDW/MPv0RwbITRD4xQXOvKoPYtLDq8IdZTfdF/cQSo5Yn4qvhfSSZgjgkTFsqJD2wOUG4ovV8Q==}
@@ -8364,6 +8364,10 @@ packages:
     resolution: {integrity: sha512-6fPc+R4ihwqP6N/aIv2f1gMH8lOVtWQHoqC4yK6oSDVVocumAsfCqjkXnqiYMhmMwS/mEHLp7Vehlt3ql6lEig==}
     engines: {node: '>=8'}
 
+  strip-json-comments@5.0.3:
+    resolution: {integrity: sha512-1tB5mhVo7U+ETBKNf92xT4hrQa3pm0MZ0PQvuDnWgAAGHDsfp4lPSpiS6psrSiet87wyGPh9ft6wmhOMQ0hDiw==}
+    engines: {node: '>=14.16'}
+
   structured-source@3.0.2:
     resolution: {integrity: sha512-Ap7JHfKgmH40SUjumqyKTHYHNZ8GvGQskP34ks0ElHCDEig+bYGpmXVksxPSrgcY9rkJqhVMzfeg5GIpZelfpQ==}
 
@@ -8477,9 +8481,11 @@ packages:
   textlint-rule-common-misspellings@1.0.1:
     resolution: {integrity: sha512-f5KWhQFJzJBUX3RirAS25aSkAaaOHeSHtBeb7d49O+vxnAX3dZBS5DB/e5M1kR4tifW4qae64oqWZygoGYWkjQ==}
 
-  textlint-rule-diacritics@1.0.0:
-    resolution: {integrity: sha512-hhJvDZzhV+sKD7walPQ4VmWkBw5o1T/lFLRsoDsAJF+LYhD89R5/L4yFVtxFRUkP9VZ5cvoUIPkYjZvkPEawTA==}
-    engines: {node: '>=8.6'}
+  textlint-rule-diacritics@2.1.4:
+    resolution: {integrity: sha512-BiE9sYEpIuN/g5LuDmB1ksLKOd6pwr4KwU+1e0eNQX1SFZwSmOZqqIxaBA91yvoHExb+/hQZrop4lrpfM4JbIQ==}
+    engines: {node: '>=20'}
+    peerDependencies:
+      textlint: '>=13'
 
   textlint-rule-en-capitalization@2.0.3:
     resolution: {integrity: sha512-tIx2gzm3okWfK5+0NNV1ap21LHk9PTc2/IXNqFhd7RDVSqv7YFaZnhwL+UrBZXTEfOh6VgnTQd81Os2Akzas5g==}
@@ -9202,8 +9208,8 @@ packages:
   vue-component-type-helpers@2.2.10:
     resolution: {integrity: sha512-iDUO7uQK+Sab2tYuiP9D1oLujCWlhHELHMgV/cB13cuGbG4qwkLHvtfWb6FzvxrIOPDnU0oHsz2MlQjhYDeaHA==}
 
-  vue-component-type-helpers@3.0.4:
-    resolution: {integrity: sha512-WtR3kPk8vqKYfCK/HGyT47lK/T3FaVyWxaCNuosaHYE8h9/k0lYRZ/PI/+T/z2wP+uuNKmL6z30rOcBboOu/YA==}
+  vue-component-type-helpers@3.0.5:
+    resolution: {integrity: sha512-uoNZaJ+a1/zppa/Vgmi8zIOP2PHXDN2rT8NyF+zQRK6ZG94lNB9prcV0GdLJbY9i9lrD47JOVIH92SaiA7oJ1A==}
 
   vue-docgen-api@4.79.2:
     resolution: {integrity: sha512-n9ENAcs+40awPZMsas7STqjkZiVlIjxIKgiJr5rSohDP0/JCrD9VtlzNojafsA1MChm/hz2h3PDtUedx3lbgfA==}
@@ -11527,7 +11533,7 @@ snapshots:
       ts-dedent: 2.2.0
       type-fest: 2.19.0
       vue: 3.5.18(typescript@5.8.3)
-      vue-component-type-helpers: 3.0.4
+      vue-component-type-helpers: 3.0.5
 
   '@stroncium/procfs@1.2.1': {}
 
@@ -15922,7 +15928,7 @@ snapshots:
 
   markdown-title@1.0.2: {}
 
-  match-casing@1.0.3: {}
+  match-casing@2.0.1: {}
 
   match-index@1.0.3:
     dependencies:
@@ -18380,6 +18386,8 @@ snapshots:
 
   strip-json-comments@3.1.1: {}
 
+  strip-json-comments@5.0.3: {}
+
   structured-source@3.0.2:
     dependencies:
       boundary: 1.0.1
@@ -18512,10 +18520,11 @@ snapshots:
       misspellings: 1.1.0
       textlint-rule-helper: 1.2.0
 
-  textlint-rule-diacritics@1.0.0:
+  textlint-rule-diacritics@2.1.4(textlint@12.6.1):
     dependencies:
-      match-casing: 1.0.3
-      strip-json-comments: 3.1.1
+      match-casing: 2.0.1
+      strip-json-comments: 5.0.3
+      textlint: 12.6.1
 
   textlint-rule-en-capitalization@2.0.3:
     dependencies:
@@ -19357,7 +19366,7 @@ snapshots:
 
   vue-component-type-helpers@2.2.10: {}
 
-  vue-component-type-helpers@3.0.4: {}
+  vue-component-type-helpers@3.0.5: {}
 
   vue-docgen-api@4.79.2(vue@3.5.18(typescript@5.8.3)):
     dependencies: