diff --git a/README.md b/README.md
index d68adb6..b61ab74 100644
--- a/README.md
+++ b/README.md
@@ -5,17 +5,12 @@ For More information, please refer to the Top Page.
 [TODO REAL](https://todo-real-c28fa.web.app/)
 
 ## Getting Started
-First run this command to install required packages:
-
-```bash
-npm install
-```
-
-Then, run the development server:
+Run the development server:
 
 ```bash
 npm run dev
 ```
+This includes `npm i` and `next dev`, so you don't have to care about refreshing packages.
 
 ## Learn More
 To learn more about Next.js, take a look at the following resources:
@@ -46,7 +41,7 @@ Then, you can start the emulator by running the following command if you have ac
 cd .\functions\
 npm run emu
 ```
-This command includes `firebase emulators:start` and `npx tsc --watch` which watches the files and restarts the server when the files are changed.
+This command includes `npm i`, `firebase emulators:start` and `npx tsc --watch` which watches the files and restarts the server when the files are changed.
 
 if you don't want ts-node to watch the files, just use
 ```
diff --git a/src/Components/GoalModal/CopyGoalAfterPostButton.tsx b/src/Components/GoalModal/CopyGoalAfterPostButton.tsx
index 4551ede..1d5365d 100644
--- a/src/Components/GoalModal/CopyGoalAfterPostButton.tsx
+++ b/src/Components/GoalModal/CopyGoalAfterPostButton.tsx
@@ -22,8 +22,8 @@ export default function CopyGoalAfterPostButton({
         onClick={() => {
           setOpen(true);
           showSnackBar({
-            message: "1日後の同じ時間で同じ目標を作成できます",
-            type: "success",
+            message: "明日の同じ時間で同じ目標を作成できます",
+            type: "normal",
           });
         }}
       >
diff --git a/src/Components/GoalModal/CopyGoalButton.tsx b/src/Components/GoalModal/CopyGoalButton.tsx
index dd70c6f..ce5a35d 100644
--- a/src/Components/GoalModal/CopyGoalButton.tsx
+++ b/src/Components/GoalModal/CopyGoalButton.tsx
@@ -18,8 +18,8 @@ export default function CopyModalButton({
         onClick={() => {
           setOpen(true);
           showSnackBar({
-            message: "1日後の同じ時間で同じ目標を作成できます",
-            type: "success",
+            message: "明日の同じ時間で同じ目標を作成できます",
+            type: "normal",
           });
         }}
         sx={{ cursor: "pointer", fontSize: "23px" }}
diff --git a/src/Components/GoalModal/CreateGoalModal.tsx b/src/Components/GoalModal/CreateGoalModal.tsx
index 84a9b3f..d56761d 100644
--- a/src/Components/GoalModal/CreateGoalModal.tsx
+++ b/src/Components/GoalModal/CreateGoalModal.tsx
@@ -33,6 +33,17 @@ export default function CreateGoalModal({
 
   const { user } = useUser();
 
+  const resetDeadline = () => {
+    // 次の日の23時に設定
+    const nextDay = new Date();
+    nextDay.setDate(nextDay.getDate() + 1);
+    nextDay.setHours(23, 0, 0, 0);
+    const localNextDay = new Date(
+      nextDay.getTime() - nextDay.getTimezoneOffset() * 60000
+    );
+    setDeadline(localNextDay.toISOString().slice(0, 16));
+  };
+
   useEffect(() => {
     if (defaultText) {
       setText(defaultText);
@@ -42,17 +53,10 @@ export default function CreateGoalModal({
       const localDate = new Date(
         convertedDate.getTime() - convertedDate.getTimezoneOffset() * 60000
       );
-      localDate.setDate(localDate.getDate() + 1); // 1日後にする
+      localDate.setDate(localDate.getDate() + 1); // 明日にする
       setDeadline(localDate.toISOString().slice(0, 16));
     } else {
-      // 初期値の指定が無い場合は次の日の23時に設定
-      const nextDay = new Date();
-      nextDay.setDate(nextDay.getDate() + 1);
-      nextDay.setHours(23, 0, 0, 0);
-      const localNextDay = new Date(
-        nextDay.getTime() - nextDay.getTimezoneOffset() * 60000
-      );
-      setDeadline(localNextDay.toISOString().slice(0, 16));
+      resetDeadline();
     }
   }, [defaultText, defaultDeadline]);
 
@@ -75,7 +79,7 @@ export default function CreateGoalModal({
       triggerDashBoardRerender();
 
       setText("");
-      setDeadline("");
+      resetDeadline();
       setOpen(false);
     } catch (error: unknown) {
       console.error("Error creating goal:", error);