diff --git a/README.md b/README.md
index 2571013..286de4f 100644
--- a/README.md
+++ b/README.md
@@ -251,7 +251,7 @@ catalog.quantities.map((q) => [q.id, q.defaultUnit, q.units.map((u) => u.id)]);
 // [["acceleration", "m/s^2", ["m/s^2", "g", "mg", "cm/s^2"]], ["angular_velocity", "deg/s", ["deg/s", "rad/s", "rpm"]], ...]
 ```
 
-## Unreleased: audio and video
+## 4.2.0: audio and video
 
 - `uploadMedia` adds an audio or video recording to a dataset; `sendDataset` takes them as `media`, also without any time-series.
 - `listDatasets` lists the project's datasets with their time-series and recordings; `downloadMedia` fetches a recording.
diff --git a/package-lock.json b/package-lock.json
index f016db5..4d7887b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "edge-ml",
-    "version": "4.1.0",
+    "version": "4.2.0",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "edge-ml",
-            "version": "4.1.0",
+            "version": "4.2.0",
             "license": "MIT",
             "devDependencies": {
                 "@rollup/plugin-alias": "^5.1.1",
diff --git a/package.json b/package.json
index 567bb9f..1bbb0ce 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "edge-ml",
-    "version": "4.1.0",
+    "version": "4.2.0",
     "description": "JavaScript library for edge-ml (https://github.com/edge-ml): collect data, train models and run them in the browser or Node.js",
     "main": "dist/index.js",
     "module": "dist/index.mjs",