diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 24b0dbcd..0ebc1a4a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -6,11 +6,10 @@ jobs:
     runs-on: ${{ matrix.operating-system }}
     strategy:
       matrix:
-        #operating-system: [macos-latest, ubuntu-latest, windows-latest]
-        operating-system: [ubuntu-latest]
+        operating-system: [macos-latest, ubuntu-latest, windows-latest]
         ocaml-version: [ '4.08.0' ]
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@main
     - uses: avsm/setup-ocaml@master
       with:
         ocaml-version: ${{ matrix.ocaml-version }}
diff --git a/README.md b/README.md
index 1d360c32..638d48ba 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# OCaml-containers 📦  [![Build Status](https://travis-ci.org/c-cube/ocaml-containers.svg?branch=master)](https://travis-ci.org/c-cube/ocaml-containers)
+# OCaml-containers 📦  [![Build Status](https://travis-ci.org/c-cube/ocaml-containers.svg?branch=master)](https://travis-ci.org/c-cube/ocaml-containers) ![build gh](https://github.com/c-cube/ocaml-containers/workflows/build/badge.svg)
 
 A modular, clean and powerful extension of the OCaml standard library.