diff --git a/bin.ts b/bin.ts
index 48e1e6570..29076605c 100755
--- a/bin.ts
+++ b/bin.ts
@@ -16,6 +16,7 @@ const argv = parseArgs(Deno.args, {
     https: true,
     quiet: false,
     head: null,
+    combine: false,
     "bullet-style": "-",
     sortReleases: true,
   },
@@ -27,6 +28,7 @@ const argv = parseArgs(Deno.args, {
     "quiet",
     "sortReleases",
     "help",
+    "combine"
   ],
   alias: {
     h: "help",
@@ -98,9 +100,35 @@ try {
     }
   }
 
+  if (argv.combine) {
+    const combinedReleases = changelog.releases.reduce((acc, release) => {
+      if (release.version) {
+        if (acc[release.version]) {
+          acc[release.version].combineChanges(release.changes);
+        } else {
+          acc[release.version] = release;
+        }
+      }
+      return acc;
+    }, {} as Record<string, typeof changelog.releases[0]>);
+
+    changelog.releases = Object.values(combinedReleases);
+
+    console.info(combinedReleases);
+  }
+
   if (argv.create) {
     const version = typeof argv.create === "string" ? argv.create : undefined;
-    changelog.addRelease(new Release(version));
+
+    const release = changelog.releases.find((release) => {
+      return release.version === version
+    });
+
+    if (release) {
+      console.warn("Release already exists.");
+    } else {
+      changelog.addRelease(new Release(version));
+    }
   }
 
   save(file, changelog);
@@ -204,6 +232,7 @@ Options:
   --latest-release    Print the latest release version
 
   --release           Set the date of the specified release
+  --combine           Combine changes from releases with the same version
   --create            Create a new release
 
   --sortReleases      Sort releases (default: true)
diff --git a/src/Release.ts b/src/Release.ts
index 0d147fd80..dbda19b15 100644
--- a/src/Release.ts
+++ b/src/Release.ts
@@ -59,6 +59,18 @@ export default class Release {
     return 0;
   }
 
+  combineChanges(changes: Map<string, Change[]>) {
+    changes.forEach((changes, type) => {
+      if (!this.changes.has(type)) {
+        this.changes.set(type, []);
+      }
+
+      this.changes.get(type)!.push(...changes);
+    });
+
+    return this;
+  }
+
   isEmpty() {
     if (this.description.trim()) {
       return false;
diff --git a/test/test.ts b/test/test.ts
index b6e239be1..7fd69aca1 100644
--- a/test/test.ts
+++ b/test/test.ts
@@ -1,4 +1,4 @@
-import { Changelog, parser, Release } from "../mod.ts";
+import { Change, Changelog, parser, Release } from "../mod.ts";
 import customRelease from "./fixture/CustomRelease.ts";
 import { assertEquals } from "./deps.ts";
 
@@ -144,6 +144,34 @@ Deno.test("should update the date of a dated release", function () {
   assertEquals(release.date?.getUTCDate(), 2);
 });
 
+Deno.test("should combine changes with other release", function () {
+  const releaseA = new Release();
+  releaseA.addChange("added", "foo");
+  const releaseB = new Release();
+  releaseB.addChange("added", "bar");
+
+  const expectedResult = new Map<string, Change[]>();
+  expectedResult.set("added", [
+      new Change("foo"),
+      new Change("bar")
+    ]
+  );
+  expectedResult.set("changed", []);
+  expectedResult.set("deprecated", []);
+  expectedResult.set("removed", []);
+  expectedResult.set("fixed", []);
+  expectedResult.set("security", []);
+
+  releaseA.combineChanges(releaseB.changes);
+
+  assertEquals(releaseA.changes.get("added"), expectedResult.get("added"));
+  assertEquals(releaseA.changes.get("changed"), expectedResult.get("changed"));
+  assertEquals(releaseA.changes.get("deprecated"), expectedResult.get("deprecated"));
+  assertEquals(releaseA.changes.get("removed"), expectedResult.get("removed"));
+  assertEquals(releaseA.changes.get("fixed"), expectedResult.get("fixed"));
+  assertEquals(releaseA.changes.get("security"), expectedResult.get("security"));
+});
+
 Deno.test("adds a change with a new method maintenance()", function () {
   assertEquals(
     customRelease().maintenance("maintenance").isEmpty(),