diff --git a/.config/example.yml b/.config/example.yml
index 5cf984e9e0..29f4a62290 100644
--- a/.config/example.yml
+++ b/.config/example.yml
@@ -93,6 +93,9 @@ id: 'aid'
 #   ┌─────────────────────┐
 #───┘ Other configuration └─────────────────────────────────────
 
+# Max note length, should be < 8000.
+#maxNoteLength: 3000
+
 # Whether disable HSTS
 #disableHsts: true
 
diff --git a/CALCKEY.md b/CALCKEY.md
index b164e5f311..f1a62548b2 100644
--- a/CALCKEY.md
+++ b/CALCKEY.md
@@ -29,6 +29,7 @@
 ## Work in progress
 
 - Weblate project
+- Customizable max note length
 - Link verification
 - Better Messaging UI
 - Better API Documentation
diff --git a/packages/backend/src/config/types.ts b/packages/backend/src/config/types.ts
index aff67ffa67..9872b0eeb3 100644
--- a/packages/backend/src/config/types.ts
+++ b/packages/backend/src/config/types.ts
@@ -67,6 +67,7 @@ export type Source = {
 	// Managed hosting stuff
 	maxUserSignups?: number;
 	isManagedHosting?: boolean;
+	maxNoteLength?: number;
 	deepl: {
 		managed?: boolean;
 		authKey?: string;
diff --git a/packages/backend/src/const.ts b/packages/backend/src/const.ts
index 17fdb45ec0..172edca0df 100644
--- a/packages/backend/src/const.ts
+++ b/packages/backend/src/const.ts
@@ -1,4 +1,6 @@
-export const MAX_NOTE_TEXT_LENGTH = 3000;
+import config from '@/config/index.js';
+
+export const MAX_NOTE_TEXT_LENGTH = config.maxNoteLength != null ? config.maxNoteLength : 3000;
 
 export const SECOND = 1000;
 export const SEC = 1000;