diff --git a/.chglog/CHANGELOG.tpl.md b/.chglog/CHANGELOG.tpl.md
index 95a8415..3f7457d 100755
--- a/.chglog/CHANGELOG.tpl.md
+++ b/.chglog/CHANGELOG.tpl.md
@@ -6,10 +6,14 @@
 {{ range .CommitGroups -}}
 ### {{ .Title }}
 
+{{ $subjects := list }}
 {{ range .Commits -}}
+{{ if not (has .Subject $subjects) -}}
 - {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
+{{ $subjects = append $subjects .Subject -}}
 {{ end }}
-{{ end -}}
+{{- end }}
+{{- end -}}
 
 {{- if .NoteGroups -}}
 {{ range .NoteGroups -}}
diff --git a/.drone.jsonnet b/.drone.jsonnet
index 414ae95..c8e9760 100644
--- a/.drone.jsonnet
+++ b/.drone.jsonnet
@@ -42,14 +42,21 @@ local PipelineBuildPackage = {
       ],
     },
     {
-      name: 'changelog',
+      name: 'changelog-generate',
       image: 'thegeeklab/git-chglog',
       commands: [
         'git fetch -tq',
-        'git-chglog --no-color --no-emoji ${DRONE_TAG:---next-tag unreleased unreleased}',
         'git-chglog --no-color --no-emoji -o CHANGELOG.md ${DRONE_TAG:---next-tag unreleased unreleased}',
       ],
     },
+    {
+      name: 'changelog-format',
+      image: 'thegeeklab/alpine-tools',
+      commands: [
+        'prettier CHANGELOG.md',
+        'prettier -w CHANGELOG.md',
+      ],
+    },
     {
       name: 'publish-github',
       image: 'plugins/github-release',
diff --git a/.drone.yml b/.drone.yml
index c16e571..c8e039a 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -37,13 +37,18 @@ steps:
   commands:
   - sha256sum wait-for > sha256sum.txt
 
-- name: changelog
+- name: changelog-generate
   image: thegeeklab/git-chglog
   commands:
   - git fetch -tq
-  - git-chglog --no-color --no-emoji ${DRONE_TAG:---next-tag unreleased unreleased}
   - git-chglog --no-color --no-emoji -o CHANGELOG.md ${DRONE_TAG:---next-tag unreleased unreleased}
 
+- name: changelog-format
+  image: thegeeklab/alpine-tools
+  commands:
+  - prettier CHANGELOG.md
+  - prettier -w CHANGELOG.md
+
 - name: publish-github
   image: plugins/github-release
   settings:
@@ -359,6 +364,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: e5b493ca16ac60cad643d506e88920384b9c07494d7d0cf854f798a0ca08e2dc
+hmac: 2bf0348e9246595526e80674f998395345ba82fb9cb71b1b46daa152c6464b4b
 
 ...
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..97e0b3e
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,2 @@
+.drone.yml
+*.tpl.md