diff --git a/src/webpage/favorites.ts b/src/webpage/favorites.ts
index 0c1799c..207e035 100644
--- a/src/webpage/favorites.ts
+++ b/src/webpage/favorites.ts
@@ -431,7 +431,9 @@ export class Favorites {
 	) {
 		this.gifs[name] = {
 			...gif,
-			format: 1,
+			width: Math.round(gif.width),
+			height: Math.round(gif.height),
+			format: "GIF_TYPE_IMAGE",
 			order: Object.keys(this.gifs).length + 1,
 		};
 		await this.save(saveImportance.high);
diff --git a/src/webpage/jsontypes.ts b/src/webpage/jsontypes.ts
index 9acc057..12bf332 100644
--- a/src/webpage/jsontypes.ts
+++ b/src/webpage/jsontypes.ts
@@ -149,7 +149,7 @@ export interface favandfreq {
 	favoriteGifs: {
 		gifs: {
 			[key: string]: {
-				format: 1;
+				format: "GIF_TYPE_IMAGE";
 				src: string;
 				width: number;
 				height: number;