diff --git a/packages/core/src/commands/clearContent.ts b/packages/core/src/commands/clearContent.ts
index a925cb45..c28cf448 100644
--- a/packages/core/src/commands/clearContent.ts
+++ b/packages/core/src/commands/clearContent.ts
@@ -6,7 +6,7 @@ declare module '@tiptap/core' {
       /**
        * Clear the whole document.
        */
-      clearContent: (emitUpdate?: Boolean) => Command,
+      clearContent: (emitUpdate?: boolean) => Command,
     }
   }
 }
diff --git a/packages/core/src/commands/setContent.ts b/packages/core/src/commands/setContent.ts
index 674b538d..90d4ee59 100644
--- a/packages/core/src/commands/setContent.ts
+++ b/packages/core/src/commands/setContent.ts
@@ -10,7 +10,7 @@ declare module '@tiptap/core' {
        */
       setContent: (
         content: Content,
-        emitUpdate?: Boolean,
+        emitUpdate?: boolean,
         parseOptions?: Record<string, any>,
       ) => Command,
     }