diff --git a/.changeset/rich-scissors-taste.md b/.changeset/rich-scissors-taste.md
new file mode 100644
index 0000000..754f44e
--- /dev/null
+++ b/.changeset/rich-scissors-taste.md
@@ -0,0 +1,5 @@
+---
+"@open-frames/proxy-types": patch
+---
+
+Fixed return type for image ratio
diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts
index 18341b7..61ad60c 100644
--- a/packages/types/src/index.ts
+++ b/packages/types/src/index.ts
@@ -5,7 +5,7 @@ export type PostRedirectResponse = {
 
 export type OpenFrameImage = {
 	content: string;
-	aspectRatio?: '1.91.1' | '1:1';
+	aspectRatio?: '1.91:1' | '1:1';
 	alt?: string;
 };