diff --git a/src/handlers/handlers.ts b/src/handlers/handlers.ts
index 0c19dc3..0f65d56 100644
--- a/src/handlers/handlers.ts
+++ b/src/handlers/handlers.ts
@@ -149,9 +149,7 @@ export const extract: Handler = {
 export const rotate: Handler = {
   args: [VArg],
   apply: (context, pipe, angel) => {
-    return pipe.rotate(angel, {
-      background: context.background,
-    });
+    return pipe.rotate(angel, { background: context.background });
   },
 };
 
@@ -196,13 +194,10 @@ export const blur: Handler = {
 };
 
 // https://sharp.pixelplumbing.com/api-operation#flatten
-// TODO: Support background
 export const flatten: Handler = {
   args: [VArg, VArg, VArg],
   apply: (context, pipe) => {
-    return pipe.flatten({
-      background: context.background,
-    });
+    return pipe.flatten({ background: context.background });
   },
 };
 
diff --git a/src/handlers/utils.ts b/src/handlers/utils.ts
index 7b53af8..574c715 100644
--- a/src/handlers/utils.ts
+++ b/src/handlers/utils.ts
@@ -16,6 +16,7 @@ export function VArg(argument: string) {
   } catch {
     // ignore parsing errors
   }
+  return argument;
 }
 
 export function parseArgs(
diff --git a/src/ipx.ts b/src/ipx.ts
index 9e7b6a3..d6f3372 100644
--- a/src/ipx.ts
+++ b/src/ipx.ts
@@ -345,9 +345,12 @@ export function createIPX(userOptions: IPXOptions): IPX {
         }))
         .filter((h) => h.handler)
         .sort((a, b) => {
-          const aKey = (a.handler.order || a.name || "").toString();
-          const bKey = (b.handler.order || b.name || "").toString();
-          return aKey.localeCompare(bKey);
+          const aOrder =
+            typeof a.handler.order === "number" ? a.handler.order : Infinity;
+          const bOrder =
+            typeof b.handler.order === "number" ? b.handler.order : Infinity;
+          if (aOrder !== bOrder) return aOrder - bOrder;
+          return (a.name || "").localeCompare(b.name || "");
         });
 
       // Apply handlers