diff --git a/.github/workflows/create-target.yml b/.github/workflows/create-target.yml
index a660981..8c6db9a 100644
--- a/.github/workflows/create-target.yml
+++ b/.github/workflows/create-target.yml
@@ -70,12 +70,12 @@ jobs:
       - name: Get changelog
         uses: ./.github/actions/get-changelog
         with:
-          version: 202x.x.x (Unreleased)
+          version: Unreleased
         id: changelog
       # CHANGELOG.mdのバージョンの書き換え
       - name: Modify CHANGELOG.md
         run: |
-          sed -i 's/## 202x.x.x (Unreleased)/## ${{ steps.target_version.outputs.result }}/' CHANGELOG.md
+          sed -i 's/## Unreleased/## ${{ steps.target_version.outputs.result }}/' CHANGELOG.md
       # release/ブランチとタグを作成
       - name: Commit version
         run: |
diff --git a/.github/workflows/merge.yml b/.github/workflows/merge.yml
index d1a40da..8d12d41 100644
--- a/.github/workflows/merge.yml
+++ b/.github/workflows/merge.yml
@@ -15,6 +15,13 @@ on:
         type: string
         description: 'package.jsons to rewrite (json)'
         default: 'package.json'
+      changes_template:
+        type: string
+        description: 'Template for CHANGELOG.md'
+        default: |
+          ## Unreleased
+          -
+          
     secrets:
       RULESET_EDIT_APP_ID:
         description: 'App ID for app to edit rulesets'
@@ -191,18 +198,7 @@ jobs:
           ref: ${{ steps.declear-base-branch.outputs.base_branch }}
       - name: Prepend CHANGELOG template
         env:
-          CHANGES_TEMPLATE: |
-            ## 202x.x.x (Unreleased)
-
-            ### General
-            -
-            
-            ### Client
-            -
-            
-            ### Server
-            -
-            
+          CHANGES_TEMPLATE: ${{ inputs.changes_template }}
         run: sed -i "1i $(echo "${CHANGES_TEMPLATE}" | sed -r 's/$/\\n/' | while IFS= read -r line; do echo -n "$line"; done)" CHANGELOG.md
       - name: Update CHANGELOG.md (prepend template)
         run: |
diff --git a/.github/workflows/release-with-dispatch.yml b/.github/workflows/release-with-dispatch.yml
index e61ff89..4018d3b 100644
--- a/.github/workflows/release-with-dispatch.yml
+++ b/.github/workflows/release-with-dispatch.yml
@@ -47,6 +47,20 @@ jobs:
       pr_number: ${{ needs.get-pr.outputs.pr_number }}
       user: LuckyBeast
       package_jsons_to_rewrite: ${{ vars.PACKAGE_JSONS_TO_REWRITE }}
+      # Text to prepend to the changelog
+      # The first line must be `## Unreleased`
+      changes_template: |
+        ## Unreleased
+
+        ### General
+        -
+        
+        ### Client
+        -
+        
+        ### Server
+        -
+        
     secrets:
       RULESET_EDIT_APP_ID: ${{ secrets.RULESET_EDIT_APP_ID }}
       RULESET_EDIT_APP_PRIVATE_KEY: ${{ secrets.RULESET_EDIT_APP_PRIVATE_KEY }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 904ef3e..7e9f16d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 202x.x.x (Unreleased)
+## Unreleased
 
 ### General
 -