diff --git a/packages/extension-subscript/src/subscript.ts b/packages/extension-subscript/src/subscript.ts
index 27dc1675..1ad35caa 100644
--- a/packages/extension-subscript/src/subscript.ts
+++ b/packages/extension-subscript/src/subscript.ts
@@ -30,8 +30,6 @@ export const Subscript = Mark.create<SubscriptExtensionOptions>({
     HTMLAttributes: {},
   },
 
-  excludes: 'superscript',
-
   parseHTML() {
     return [
       {
diff --git a/packages/extension-superscript/src/superscript.ts b/packages/extension-superscript/src/superscript.ts
index 6626ca2d..5c041b1b 100644
--- a/packages/extension-superscript/src/superscript.ts
+++ b/packages/extension-superscript/src/superscript.ts
@@ -30,8 +30,6 @@ export const Superscript = Mark.create<SuperscriptExtensionOptions>({
     HTMLAttributes: {},
   },
 
-  excludes: 'subscript',
-
   parseHTML() {
     return [
       {