diff --git a/packages/core-mt/package.json b/packages/core-mt/package.json
index 7e0a74a..2d6a638 100644
--- a/packages/core-mt/package.json
+++ b/packages/core-mt/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@ffmpeg/core-mt",
   "version": "0.12.0-alpha.0",
-  "description": "FFmpeg WebAssembly version",
+  "description": "FFmpeg WebAssembly version (multi thread)",
   "main": "./dist/umd/ffmpeg-core.js",
   "exports": {
     ".": {
diff --git a/packages/core/package.json b/packages/core/package.json
index 4a7f748..830bf50 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@ffmpeg/core",
   "version": "0.12.0-alpha.0",
-  "description": "FFmpeg WebAssembly version",
+  "description": "FFmpeg WebAssembly version (single thread)",
   "main": "./dist/umd/ffmpeg-core.js",
   "exports": {
     ".": {