diff --git a/MODIFICATIONS.md b/MODIFICATIONS.md
index 197875a..bc876d2 100644
--- a/MODIFICATIONS.md
+++ b/MODIFICATIONS.md
@@ -1,5 +1,10 @@
 # Modifications
 
+## [2.0.4-mod.2025.4]
+
+- Fix type declaration: Fix return type of `Subset#encode` to be `Uint8Array`
+
+
 ## [2.0.4-mod.2025.3]
 
 ### Feature/Dependency Removals
diff --git a/package-lock.json b/package-lock.json
index 6403e03..586498a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@denkiyagi/fontkit",
-  "version": "2.0.4-mod.2025.3",
+  "version": "2.0.4-mod.2025.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@denkiyagi/fontkit",
-      "version": "2.0.4-mod.2025.3",
+      "version": "2.0.4-mod.2025.4",
       "license": "MIT",
       "dependencies": {
         "@swc/helpers": "^0.5.17",
diff --git a/package.json b/package.json
index 92ed06e..f115914 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@denkiyagi/fontkit",
-  "version": "2.0.4-mod.2025.3",
+  "version": "2.0.4-mod.2025.4",
   "description": "A modified version of fontkit. An advanced font engine for Node and the browser",
   "keywords": [
     "opentype",
diff --git a/src/subset/Subset.js b/src/subset/Subset.js
index 5d0d570..5635999 100644
--- a/src/subset/Subset.js
+++ b/src/subset/Subset.js
@@ -53,6 +53,7 @@ export default class Subset {
 
   /**
    * @abstract
+   * @returns {Uint8Array}
    */
   encode() {
     throw new AssertionError('Subset.encode() must be overridden by subclasses');