diff --git a/.github/workflows/d.yml b/.github/workflows/d.yml
index 10e81ea..2fd34ed 100644
--- a/.github/workflows/d.yml
+++ b/.github/workflows/d.yml
@@ -6,9 +6,9 @@ name: D
 
 on:
   push:
-    branches: [ "master" ]
+    branches: [ "**" ]
   pull_request:
-    branches: [ "master" ]
+    branches: [ "**" ]
 
 permissions:
   contents: read
@@ -22,6 +22,12 @@ jobs:
     - uses: actions/checkout@v3
     - uses: dlang-community/setup-dlang@4c99aa991ce7d19dd3064de0a4f2f6b2f152e2d7
 
+
+    - name: Install Doveralls (code coverage tool)
+      run: |
+          dub fetch doveralls
+          sudo apt install libcurl4-openssl-dev
+
     - name: 'Build & Test'
       run: |
         # Build the project, with its main file included, without unittests
@@ -29,4 +35,8 @@ jobs:
         # Build and run tests, as defined by `unittest` configuration
         # In this mode, `mainSourceFile` is excluded and `version (unittest)` are included
         # See https://dub.pm/package-format-json.html#configurations
-        dub test --compiler=$DC
+        dub test --compiler=$DC --coverage
+
+    - name: Coverage upload
+      run: |
+          dub run doveralls -- -t ${{secrets.COVERALLS_REPO_TOKEN}}
diff --git a/README.md b/README.md
index 96613e0..8e4281d 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 doap
 ====
 
-[![D](https://github.com/deavmi/doap/actions/workflows/d.yml/badge.svg?branch=master)](https://github.com/deavmi/doap/actions/workflows/d.yml)
+[![D](https://github.com/deavmi/doap/actions/workflows/d.yml/badge.svg?branch=master)](https://github.com/deavmi/doap/actions/workflows/d.yml) [![Coverage Status](https://coveralls.io/repos/github/deavmi/doap/badge.svg?branch=master)](https://coveralls.io/github/deavmi/doap?branch=master)
 
 **doap** is a CoAP library for the D programming language.
 
@@ -13,7 +13,7 @@ Documentation is available [here](https://doap.dpldocs.info/).
 
 ### Making a request
 
-```
+```d
 CoapClient client = new CoapClient("coap.me", 5683);
     
 CoapRequestFuture future = client.newRequestBuilder()