diff --git a/src/backend/common/ConfigManager.ts b/src/backend/common/ConfigManager.ts
index 20a00ee282..22f5db1d28 100644
--- a/src/backend/common/ConfigManager.ts
+++ b/src/backend/common/ConfigManager.ts
@@ -265,6 +265,17 @@ const migrations: [string, (store: Record<string, unknown>) => unknown][] = [
       return config;
     },
   ],
+  [
+    ">=0.22",
+    (config) => {
+      // プリセットに文内無音倍率を追加
+      const presets = config.presets as ConfigType["presets"];
+      for (const preset of Object.values(presets.items)) {
+        if (preset == undefined) throw new Error("preset == undefined");
+        preset.pauseLengthScale = 1;
+      }
+    },
+  ],
 ];
 
 export type Metadata = {
diff --git a/src/domain/project/index.ts b/src/domain/project/index.ts
index 1deb9974a7..593d81f42c 100644
--- a/src/domain/project/index.ts
+++ b/src/domain/project/index.ts
@@ -127,7 +127,6 @@ export const migrateProjectFileObject = async (
         projectData.audioItems[audioItemsKey].query.volumeScale = 1;
         projectData.audioItems[audioItemsKey].query.prePhonemeLength = 0.1;
         projectData.audioItems[audioItemsKey].query.postPhonemeLength = 0.1;
-        projectData.audioItems[audioItemsKey].query.pauseLengthScale = 1;
         projectData.audioItems[audioItemsKey].query.outputSamplingRate =
           DEFAULT_SAMPLING_RATE;
       }
@@ -303,6 +302,14 @@ export const migrateProjectFileObject = async (
     projectData.song.trackOrder = Object.keys(newTracks);
   }
 
+  if (semver.satisfies(projectAppVersion, "<0.22.0", semverSatisfiesOptions)) {
+    // 文内無音倍率の追加
+    for (const audioItemsKey in projectData.talk.audioItems) {
+      projectData.talk.audioItems[audioItemsKey].query.pauseLengthScale = 1;
+      console.log(projectData.talk.audioItems[audioItemsKey].query);
+    }
+  }
+
   // Validation check
   // トークはvalidateTalkProjectで検証する
   // ソングはSET_SCOREの中の`isValidScore`関数で検証される