diff --git a/src/stylis-rtl.ts b/src/stylis-rtl.ts
index 581bf93..658cc6c 100644
--- a/src/stylis-rtl.ts
+++ b/src/stylis-rtl.ts
@@ -1,4 +1,4 @@
-import cssjanus from 'cssjanus';
+import cssjanus from "cssjanus";
 import {
   COMMENT,
   compile,
@@ -7,26 +7,22 @@ import {
   RULESET,
   serialize,
   strlen,
-  Middleware,
   KEYFRAMES,
   MEDIA,
   SUPPORTS,
-} from 'stylis';
+  Element,
+} from "stylis";
 
-type MiddlewareParams = Parameters<Middleware>;
-
-function stringifyPreserveComments(
-  element: MiddlewareParams[0],
-  index: MiddlewareParams[1],
-  children: MiddlewareParams[2]
-): string {
+function stringifyPreserveComments(element: Element): string {
   switch (element.type) {
     case IMPORT:
     case DECLARATION:
     case COMMENT:
       return (element.return = element.return || element.value);
     case RULESET: {
-      element.value = Array.isArray(element.props) ? element.props.join(',') : element.props;
+      element.value = Array.isArray(element.props)
+        ? element.props.join(",")
+        : element.props;
 
       if (Array.isArray(element.children)) {
         element.children.forEach((x) => {
@@ -36,32 +32,35 @@ function stringifyPreserveComments(
     }
   }
 
-  const serializedChildren = serialize(Array.prototype.concat(element.children), stringifyPreserveComments);
+  const serializedChildren = serialize(
+    Array.prototype.concat(element.children),
+    stringifyPreserveComments
+  );
 
-  return strlen(serializedChildren) ? (element.return = element.value + '{' + serializedChildren + '}') : '';
+  return strlen(serializedChildren)
+    ? (element.return = element.value + "{" + serializedChildren + "}")
+    : "";
 }
 
-function stylisRTLPlugin(
-  element: MiddlewareParams[0],
-  index: MiddlewareParams[1],
-  children: MiddlewareParams[2],
-  callback: MiddlewareParams[3]
-): string | void {
+function stylisRTLPlugin(element: Element): string | void {
   if (
     element.type === KEYFRAMES ||
     element.type === SUPPORTS ||
-    (element.type === RULESET && (!element.parent || element.parent.type === MEDIA || element.parent.type === RULESET))
+    (element.type === RULESET &&
+      (!element.parent ||
+        element.parent.type === MEDIA ||
+        element.parent.type === RULESET))
   ) {
-    const stringified = cssjanus.transform(stringifyPreserveComments(element, index, children));
+    const stringified = cssjanus.transform(stringifyPreserveComments(element));
 
     element.children = stringified ? compile(stringified)[0].children : [];
 
-    element.return = '';
+    element.return = "";
   }
 }
 
 // stable identifier that will not be dropped by minification unless the whole module
 // is unused
-Object.defineProperty(stylisRTLPlugin, 'name', { value: 'stylisRTLPlugin' });
+Object.defineProperty(stylisRTLPlugin, "name", { value: "stylisRTLPlugin" });
 
 export default stylisRTLPlugin;