diff --git a/.eslintrc.js b/.eslintrc.js
index 44e8122a..007700b6 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -70,6 +70,8 @@ module.exports = {
         '@typescript-eslint/ban-types': 'off',
         '@typescript-eslint/comma-dangle': ['error', 'always-multiline'],
         '@typescript-eslint/explicit-module-boundary-types': 'off',
+        '@typescript-eslint/no-namespace': 'off',
+        'no-undef': 'off',
       },
     },
   ],
diff --git a/packages/core/src/CommandManager.ts b/packages/core/src/CommandManager.ts
index b9fef148..8ac590f9 100644
--- a/packages/core/src/CommandManager.ts
+++ b/packages/core/src/CommandManager.ts
@@ -1,7 +1,5 @@
 import { EditorState, Transaction } from 'prosemirror-state'
 import {
-  SingleCommands,
-  ChainedCommands,
   Editor,
   CommandSpec,
 } from './Editor'
@@ -58,7 +56,7 @@ export default class CommandManager {
         }
 
         return [name, method]
-      })) as SingleCommands
+      })) as Tiptap.SingleCommands
   }
 
   public createChain(startTr?: Transaction, shouldDispatch = true) {
@@ -92,7 +90,7 @@ export default class CommandManager {
           return proxy
         }
       },
-    }) as ChainedCommands
+    }) as Tiptap.ChainedCommands
   }
 
   public createCan(startTr?: Transaction) {
@@ -105,7 +103,7 @@ export default class CommandManager {
       .entries(commands)
       .map(([name, command]) => {
         return [name, (...args: any[]) => command(...args)({ ...props, dispatch })]
-      })) as SingleCommands
+      })) as Tiptap.SingleCommands
 
     return {
       ...formattedCommands,
diff --git a/packages/core/src/Editor.ts b/packages/core/src/Editor.ts
index f22cd5d1..efa0af64 100644
--- a/packages/core/src/Editor.ts
+++ b/packages/core/src/Editor.ts
@@ -24,9 +24,9 @@ import style from './style'
 export type Command = (props: {
   editor: Editor,
   tr: Transaction,
-  commands: SingleCommands,
-  can: () => SingleCommands & { chain: () => ChainedCommands },
-  chain: () => ChainedCommands,
+  commands: Tiptap.SingleCommands,
+  can: () => Tiptap.SingleCommands & { chain: () => Tiptap.ChainedCommands },
+  chain: () => Tiptap.ChainedCommands,
   state: EditorState,
   view: EditorView,
   dispatch: ((args?: any) => any) | undefined,
@@ -38,35 +38,71 @@ export interface CommandsSpec {
   [key: string]: CommandSpec
 }
 
-export interface AllExtensions {}
+declare global {
+  namespace Tiptap {
+    export interface AllExtensions {}
 
-export type UnfilteredCommands = {
-  [Item in keyof AllExtensions]: AllExtensions[Item] extends Extension<any, infer ExtensionCommands>
-    ? ExtensionCommands
-    : AllExtensions[Item] extends Node<any, infer NodeCommands>
-      ? NodeCommands
-      : AllExtensions[Item] extends Mark<any, infer MarkCommands>
-        ? MarkCommands
-        : never
+    export type UnfilteredCommands = {
+      [Item in keyof AllExtensions]: AllExtensions[Item] extends Extension<any, infer ExtensionCommands>
+        ? ExtensionCommands
+        : AllExtensions[Item] extends Node<any, infer NodeCommands>
+          ? NodeCommands
+          : AllExtensions[Item] extends Mark<any, infer MarkCommands>
+            ? MarkCommands
+            : never
+    }
+
+    type ValuesOf<T> = T[keyof T];
+    type KeysWithTypeOf<T, Type> = ({[P in keyof T]: T[P] extends Type ? P : never })[keyof T]
+    type AllCommands = UnionToIntersection<ValuesOf<Pick<UnfilteredCommands, KeysWithTypeOf<UnfilteredCommands, {}>>>>
+
+    export type SingleCommands = {
+      [Item in keyof AllCommands]: AllCommands[Item] extends (...args: any[]) => any
+      ? (...args: Parameters<AllCommands[Item]>) => boolean
+      : never
+    }
+
+    export type ChainedCommands = {
+      [Item in keyof AllCommands]: AllCommands[Item] extends (...args: any[]) => any
+      ? (...args: Parameters<AllCommands[Item]>) => ChainedCommands
+      : never
+    } & {
+      run: () => boolean
+    }
+  }
 }
 
-type ValuesOf<T> = T[keyof T];
-type KeysWithTypeOf<T, Type> = ({[P in keyof T]: T[P] extends Type ? P : never })[keyof T]
-type AllCommands = UnionToIntersection<ValuesOf<Pick<UnfilteredCommands, KeysWithTypeOf<UnfilteredCommands, {}>>>>
+// type blub = Tiptap.AllExtensions
 
-export type SingleCommands = {
-  [Item in keyof AllCommands]: AllCommands[Item] extends (...args: any[]) => any
-  ? (...args: Parameters<AllCommands[Item]>) => boolean
-  : never
-}
+// export interface AllExtensions {}
 
-export type ChainedCommands = {
-  [Item in keyof AllCommands]: AllCommands[Item] extends (...args: any[]) => any
-  ? (...args: Parameters<AllCommands[Item]>) => ChainedCommands
-  : never
-} & {
-  run: () => boolean
-}
+// export type UnfilteredCommands = {
+//   [Item in keyof Tiptap.AllExtensions]: AllExtensions[Item] extends Extension<any, infer ExtensionCommands>
+//     ? ExtensionCommands
+//     : AllExtensions[Item] extends Node<any, infer NodeCommands>
+//       ? NodeCommands
+//       : AllExtensions[Item] extends Mark<any, infer MarkCommands>
+//         ? MarkCommands
+//         : never
+// }
+
+// type ValuesOf<T> = T[keyof T];
+// type KeysWithTypeOf<T, Type> = ({[P in keyof T]: T[P] extends Type ? P : never })[keyof T]
+// type AllCommands = UnionToIntersection<ValuesOf<Pick<UnfilteredCommands, KeysWithTypeOf<UnfilteredCommands, {}>>>>
+
+// export type SingleCommands = {
+//   [Item in keyof AllCommands]: AllCommands[Item] extends (...args: any[]) => any
+//   ? (...args: Parameters<AllCommands[Item]>) => boolean
+//   : never
+// }
+
+// export type ChainedCommands = {
+//   [Item in keyof AllCommands]: AllCommands[Item] extends (...args: any[]) => any
+//   ? (...args: Parameters<AllCommands[Item]>) => ChainedCommands
+//   : never
+// } & {
+//   run: () => boolean
+// }
 
 type EditorContent = string | JSON | null
 
diff --git a/packages/core/src/extensions/commands.ts b/packages/core/src/extensions/commands.ts
index 3b82b620..63d3715b 100644
--- a/packages/core/src/extensions/commands.ts
+++ b/packages/core/src/extensions/commands.ts
@@ -147,8 +147,10 @@ export const Commands = Extension.create({
   },
 })
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Commands: typeof Commands,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Commands: typeof Commands,
+    }
   }
 }
diff --git a/packages/core/src/extensions/editable.ts b/packages/core/src/extensions/editable.ts
index 4dc9f2d0..dc609ff9 100644
--- a/packages/core/src/extensions/editable.ts
+++ b/packages/core/src/extensions/editable.ts
@@ -14,8 +14,10 @@ export const Editable = Extension.create({
   },
 })
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Editable: typeof Editable,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Editable: typeof Editable,
+    }
   }
 }
diff --git a/packages/core/src/extensions/focusEvents.ts b/packages/core/src/extensions/focusEvents.ts
index 468d105f..f5be8311 100644
--- a/packages/core/src/extensions/focusEvents.ts
+++ b/packages/core/src/extensions/focusEvents.ts
@@ -36,8 +36,10 @@ export const FocusEvents = Extension.create({
   },
 })
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    FocusEvents: typeof FocusEvents,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      FocusEvents: typeof FocusEvents,
+    }
   }
 }
diff --git a/packages/core/src/extensions/keymap.ts b/packages/core/src/extensions/keymap.ts
index 99486512..99c87781 100644
--- a/packages/core/src/extensions/keymap.ts
+++ b/packages/core/src/extensions/keymap.ts
@@ -45,8 +45,10 @@ export const Keymap = Extension.create({
   },
 })
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Keymap: typeof Keymap,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Keymap: typeof Keymap,
+    }
   }
 }
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 63dee913..97316c91 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -2,7 +2,6 @@ export {
   Editor,
   Command,
   CommandsSpec,
-  AllExtensions,
 } from './Editor'
 
 export * from './Extension'
diff --git a/packages/extension-blockquote/src/index.ts b/packages/extension-blockquote/src/index.ts
index d0d3f318..d29a4c93 100644
--- a/packages/extension-blockquote/src/index.ts
+++ b/packages/extension-blockquote/src/index.ts
@@ -58,8 +58,10 @@ const Blockquote = Node.create({
 
 export default Blockquote
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Blockquote: typeof Blockquote,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Blockquote: typeof Blockquote,
+    }
   }
 }
diff --git a/packages/extension-bold/src/index.ts b/packages/extension-bold/src/index.ts
index 64ff675e..59fe2c7f 100644
--- a/packages/extension-bold/src/index.ts
+++ b/packages/extension-bold/src/index.ts
@@ -74,8 +74,10 @@ const Bold = Mark.create({
 
 export default Bold
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Bold: typeof Bold,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Bold: typeof Bold,
+    }
   }
 }
diff --git a/packages/extension-bullet-list/src/index.ts b/packages/extension-bullet-list/src/index.ts
index 3fa2338b..fbb6d9ae 100644
--- a/packages/extension-bullet-list/src/index.ts
+++ b/packages/extension-bullet-list/src/index.ts
@@ -56,8 +56,10 @@ const BulletList = Node.create({
 
 export default BulletList
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    BulletList: typeof BulletList,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      BulletList: typeof BulletList,
+    }
   }
 }
diff --git a/packages/extension-code-block/src/index.ts b/packages/extension-code-block/src/index.ts
index 2d697e9d..1c6e870c 100644
--- a/packages/extension-code-block/src/index.ts
+++ b/packages/extension-code-block/src/index.ts
@@ -99,8 +99,10 @@ const CodeBlock = Node.create({
 
 export default CodeBlock
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    CodeBlock: typeof CodeBlock,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      CodeBlock: typeof CodeBlock,
+    }
   }
 }
diff --git a/packages/extension-code/src/index.ts b/packages/extension-code/src/index.ts
index 5eb5909e..6445ec5f 100644
--- a/packages/extension-code/src/index.ts
+++ b/packages/extension-code/src/index.ts
@@ -65,8 +65,10 @@ const Code = Mark.create({
 
 export default Code
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Code: typeof Code,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Code: typeof Code,
+    }
   }
 }
diff --git a/packages/extension-collaboration-cursor/src/index.ts b/packages/extension-collaboration-cursor/src/index.ts
index ae88704c..a4fb97e3 100644
--- a/packages/extension-collaboration-cursor/src/index.ts
+++ b/packages/extension-collaboration-cursor/src/index.ts
@@ -64,8 +64,10 @@ const CollaborationCursor = Extension.create({
 
 export default CollaborationCursor
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    CollaborationCursor: typeof CollaborationCursor,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      CollaborationCursor: typeof CollaborationCursor,
+    }
   }
 }
diff --git a/packages/extension-collaboration/src/index.ts b/packages/extension-collaboration/src/index.ts
index 729ef245..3ed695ee 100644
--- a/packages/extension-collaboration/src/index.ts
+++ b/packages/extension-collaboration/src/index.ts
@@ -32,8 +32,10 @@ const Collaboration = Extension.create({
 
 export default Collaboration
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Collaboration: typeof Collaboration,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Collaboration: typeof Collaboration,
+    }
   }
 }
diff --git a/packages/extension-document/src/index.ts b/packages/extension-document/src/index.ts
index 5c9b4796..efec4dd5 100644
--- a/packages/extension-document/src/index.ts
+++ b/packages/extension-document/src/index.ts
@@ -8,8 +8,10 @@ const Document = Node.create({
 
 export default Document
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Document: typeof Document,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Document: typeof Document,
+    }
   }
 }
diff --git a/packages/extension-dropcursor/src/index.ts b/packages/extension-dropcursor/src/index.ts
index fd951be2..acbf2866 100644
--- a/packages/extension-dropcursor/src/index.ts
+++ b/packages/extension-dropcursor/src/index.ts
@@ -11,8 +11,10 @@ const Dropcursor = Extension.create({
 
 export default Dropcursor
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Dropcursor: typeof Dropcursor,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Dropcursor: typeof Dropcursor,
+    }
   }
 }
diff --git a/packages/extension-focus/src/index.ts b/packages/extension-focus/src/index.ts
index 62c7844c..10c517e7 100644
--- a/packages/extension-focus/src/index.ts
+++ b/packages/extension-focus/src/index.ts
@@ -50,8 +50,10 @@ const FocusClasses = Extension.create({
 
 export default FocusClasses
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    FocusClasses: typeof FocusClasses,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      FocusClasses: typeof FocusClasses,
+    }
   }
 }
diff --git a/packages/extension-font-family/src/index.ts b/packages/extension-font-family/src/index.ts
index e83846dc..4dbf1707 100644
--- a/packages/extension-font-family/src/index.ts
+++ b/packages/extension-font-family/src/index.ts
@@ -52,8 +52,10 @@ const FontFamily = Extension.create({
 
 export default FontFamily
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    FontFamily: typeof FontFamily,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      FontFamily: typeof FontFamily,
+    }
   }
 }
diff --git a/packages/extension-gapcursor/src/index.ts b/packages/extension-gapcursor/src/index.ts
index 09ee3846..f295bef7 100644
--- a/packages/extension-gapcursor/src/index.ts
+++ b/packages/extension-gapcursor/src/index.ts
@@ -11,8 +11,10 @@ const Gapcursor = Extension.create({
 
 export default Gapcursor
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Gapcursor: typeof Gapcursor,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Gapcursor: typeof Gapcursor,
+    }
   }
 }
diff --git a/packages/extension-hard-break/src/index.ts b/packages/extension-hard-break/src/index.ts
index 677b0941..dcaa9c40 100644
--- a/packages/extension-hard-break/src/index.ts
+++ b/packages/extension-hard-break/src/index.ts
@@ -50,8 +50,10 @@ const HardBreak = Node.create({
 
 export default HardBreak
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    HardBreak: typeof HardBreak,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      HardBreak: typeof HardBreak,
+    }
   }
 }
diff --git a/packages/extension-heading/src/index.ts b/packages/extension-heading/src/index.ts
index c02b8a81..e9420263 100644
--- a/packages/extension-heading/src/index.ts
+++ b/packages/extension-heading/src/index.ts
@@ -83,8 +83,10 @@ const Heading = Node.create({
 
 export default Heading
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Heading: typeof Heading,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Heading: typeof Heading,
+    }
   }
 }
diff --git a/packages/extension-highlight/src/index.ts b/packages/extension-highlight/src/index.ts
index c3298aa6..c57adfe5 100644
--- a/packages/extension-highlight/src/index.ts
+++ b/packages/extension-highlight/src/index.ts
@@ -88,8 +88,10 @@ const Highlight = Mark.create({
 
 export default Highlight
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Highlight: typeof Highlight,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Highlight: typeof Highlight,
+    }
   }
 }
diff --git a/packages/extension-history/src/index.ts b/packages/extension-history/src/index.ts
index 6f389f2e..12e6ed7a 100644
--- a/packages/extension-history/src/index.ts
+++ b/packages/extension-history/src/index.ts
@@ -46,8 +46,10 @@ const History = Extension.create({
 
 export default History
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    History: typeof History,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      History: typeof History,
+    }
   }
 }
diff --git a/packages/extension-horizontal-rule/src/index.ts b/packages/extension-horizontal-rule/src/index.ts
index ebab3e3b..d8f0e04d 100644
--- a/packages/extension-horizontal-rule/src/index.ts
+++ b/packages/extension-horizontal-rule/src/index.ts
@@ -47,8 +47,10 @@ const HorizontalRule = Node.create({
 
 export default HorizontalRule
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    HorizontalRule: typeof HorizontalRule,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      HorizontalRule: typeof HorizontalRule,
+    }
   }
 }
diff --git a/packages/extension-image/src/index.ts b/packages/extension-image/src/index.ts
index 7eeb831b..9a8bfd93 100644
--- a/packages/extension-image/src/index.ts
+++ b/packages/extension-image/src/index.ts
@@ -82,8 +82,10 @@ const Image = Node.create({
 
 export default Image
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Image: typeof Image,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Image: typeof Image,
+    }
   }
 }
diff --git a/packages/extension-italic/src/index.ts b/packages/extension-italic/src/index.ts
index 9843f65e..4b226186 100644
--- a/packages/extension-italic/src/index.ts
+++ b/packages/extension-italic/src/index.ts
@@ -76,8 +76,10 @@ const Italic = Mark.create({
 
 export default Italic
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Italic: typeof Italic,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Italic: typeof Italic,
+    }
   }
 }
diff --git a/packages/extension-link/src/index.ts b/packages/extension-link/src/index.ts
index 3570b998..9aaf2f16 100644
--- a/packages/extension-link/src/index.ts
+++ b/packages/extension-link/src/index.ts
@@ -93,8 +93,10 @@ const Link = Mark.create({
 
 export default Link
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Link: typeof Link,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Link: typeof Link,
+    }
   }
 }
diff --git a/packages/extension-list-item/src/index.ts b/packages/extension-list-item/src/index.ts
index b0d88118..bf587470 100644
--- a/packages/extension-list-item/src/index.ts
+++ b/packages/extension-list-item/src/index.ts
@@ -40,8 +40,10 @@ const ListItem = Node.create({
 
 export default ListItem
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    ListItem: typeof ListItem,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      ListItem: typeof ListItem,
+    }
   }
 }
diff --git a/packages/extension-ordered-list/src/index.ts b/packages/extension-ordered-list/src/index.ts
index d20b361a..da0b4afa 100644
--- a/packages/extension-ordered-list/src/index.ts
+++ b/packages/extension-ordered-list/src/index.ts
@@ -80,8 +80,10 @@ const OrderedList = Node.create({
 
 export default OrderedList
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    OrderedList: typeof OrderedList,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      OrderedList: typeof OrderedList,
+    }
   }
 }
diff --git a/packages/extension-paragraph/src/index.ts b/packages/extension-paragraph/src/index.ts
index 961d08eb..d9712f1b 100644
--- a/packages/extension-paragraph/src/index.ts
+++ b/packages/extension-paragraph/src/index.ts
@@ -47,8 +47,10 @@ const Paragraph = Node.create({
 
 export default Paragraph
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Paragraph: typeof Paragraph,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Paragraph: typeof Paragraph,
+    }
   }
 }
diff --git a/packages/extension-strike/src/index.ts b/packages/extension-strike/src/index.ts
index 197e949e..b74df416 100644
--- a/packages/extension-strike/src/index.ts
+++ b/packages/extension-strike/src/index.ts
@@ -74,8 +74,10 @@ const Strike = Mark.create({
 
 export default Strike
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Strike: typeof Strike,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Strike: typeof Strike,
+    }
   }
 }
diff --git a/packages/extension-task-item/src/index.ts b/packages/extension-task-item/src/index.ts
index ce7c0ab3..18202b4a 100644
--- a/packages/extension-task-item/src/index.ts
+++ b/packages/extension-task-item/src/index.ts
@@ -125,8 +125,10 @@ const TaskItem = Node.create({
 
 export default TaskItem
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    TaskItem: typeof TaskItem,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      TaskItem: typeof TaskItem,
+    }
   }
 }
diff --git a/packages/extension-task-list/src/index.ts b/packages/extension-task-list/src/index.ts
index 554cf283..c5c1d171 100644
--- a/packages/extension-task-list/src/index.ts
+++ b/packages/extension-task-list/src/index.ts
@@ -44,8 +44,10 @@ const TaskList = Node.create({
 
 export default TaskList
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    TaskList: typeof TaskList,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      TaskList: typeof TaskList,
+    }
   }
 }
diff --git a/packages/extension-text-align/src/index.ts b/packages/extension-text-align/src/index.ts
index 63fb2279..46847db1 100644
--- a/packages/extension-text-align/src/index.ts
+++ b/packages/extension-text-align/src/index.ts
@@ -65,8 +65,10 @@ const TextAlign = Extension.create({
 
 export default TextAlign
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    TextAlign: typeof TextAlign,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      TextAlign: typeof TextAlign,
+    }
   }
 }
diff --git a/packages/extension-text-style/src/index.ts b/packages/extension-text-style/src/index.ts
index bed66e32..aaea4511 100644
--- a/packages/extension-text-style/src/index.ts
+++ b/packages/extension-text-style/src/index.ts
@@ -46,8 +46,10 @@ const TextStyle = Mark.create({
 
 export default TextStyle
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    TextStyle: typeof TextStyle,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      TextStyle: typeof TextStyle,
+    }
   }
 }
diff --git a/packages/extension-text/src/index.ts b/packages/extension-text/src/index.ts
index b6bea78d..2180e1c2 100644
--- a/packages/extension-text/src/index.ts
+++ b/packages/extension-text/src/index.ts
@@ -7,8 +7,10 @@ const Text = Node.create({
 
 export default Text
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Text: typeof Text,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Text: typeof Text,
+    }
   }
 }
diff --git a/packages/extension-typography/src/index.ts b/packages/extension-typography/src/index.ts
index 34e696c4..3b35dc93 100644
--- a/packages/extension-typography/src/index.ts
+++ b/packages/extension-typography/src/index.ts
@@ -45,8 +45,10 @@ const Typography = Extension.create({
 
 export default Typography
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Typography: typeof Typography,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Typography: typeof Typography,
+    }
   }
 }
diff --git a/packages/extension-underline/src/index.ts b/packages/extension-underline/src/index.ts
index 0f9cb39c..4bfe1ee5 100644
--- a/packages/extension-underline/src/index.ts
+++ b/packages/extension-underline/src/index.ts
@@ -45,8 +45,10 @@ const Underline = Mark.create({
 
 export default Underline
 
-declare module '@tiptap/core' {
-  interface AllExtensions {
-    Underline: typeof Underline,
+declare global {
+  namespace Tiptap {
+    interface AllExtensions {
+      Underline: typeof Underline,
+    }
   }
 }