diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index abdeb0f..78444ba 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,7 +2,7 @@ name: CI
 
 on:
   push:
-    branches: [main]
+    branches: [v0.x.x]
   pull_request:
 
 env:
diff --git a/README.md b/README.md
index 709cbb8..2f4c363 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # tiny-mb
 
 [![CI](https://github.com/mattwend/tiny-mb/actions/workflows/ci.yml/badge.svg)](https://github.com/mattwend/tiny-mb/actions/workflows/ci.yml)
-[![codecov](https://codecov.io/gh/mattwend/tiny-mb/branch/main/graph/badge.svg)](https://codecov.io/gh/mattwend/tiny-mb)
+[![codecov](https://codecov.io/gh/mattwend/tiny-mb/branch/v0.x.x/graph/badge.svg)](https://codecov.io/gh/mattwend/tiny-mb)
 
 Small Rust Modbus library with typed request/response PDUs and a reusable Modbus TCP transport.