diff --git a/.changeset/heavy-geckos-lick.md b/.changeset/heavy-geckos-lick.md
new file mode 100644
index 000000000..95c6b1712
--- /dev/null
+++ b/.changeset/heavy-geckos-lick.md
@@ -0,0 +1,6 @@
+---
+"@changesets/apply-release-plan": patch
+"@changesets/write": patch
+---
+
+Improved compatibility with the alpha releases of Prettier v3 by awaiting the `.format` result since it's a promise in that version.
diff --git a/packages/apply-release-plan/src/index.ts b/packages/apply-release-plan/src/index.ts
index 18132cd3f..432da8245 100644
--- a/packages/apply-release-plan/src/index.ts
+++ b/packages/apply-release-plan/src/index.ts
@@ -350,7 +350,8 @@ async function writeFormattedMarkdownFile(
 ) {
   await fs.writeFile(
     filePath,
-    prettierInstance.format(content, {
+    // Prettier v3 returns a promise
+    await prettierInstance.format(content, {
       ...prettierConfig,
       filepath: filePath,
       parser: "markdown",
diff --git a/packages/write/src/index.ts b/packages/write/src/index.ts
index b9e2838c3..0fba55ac1 100644
--- a/packages/write/src/index.ts
+++ b/packages/write/src/index.ts
@@ -47,7 +47,8 @@ ${summary}
 
   await fs.writeFile(
     newChangesetPath,
-    prettierInstance.format(changesetContents, {
+    // Prettier v3 returns a promise
+    await prettierInstance.format(changesetContents, {
       ...prettierConfig,
       parser: "markdown",
     })