diff --git a/README.md b/README.md
index 0832306..b2a8ad8 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
   <p align="center">An <b>experimental</b> CQL execution engine for analyzing FHIR healthcare data at
 scale</p>
   <p align="center">
-    <a href="https://github.com/google/cql/actions"><img src="https://github.com/google/cql/workflows/go_test/badge.svg" alt="GitHub Actions Build Status"/></a>
+    <a href="https://github.com/google/cql/actions"><img src="https://github.com/google/cql/workflows/go_test/badge.svg?branch=main" alt="GitHub Actions Build Status"/></a>
     <a href="https://godoc.org/github.com/google/cql"><img src="https://godoc.org/github.com/google/cql?status.svg" alt="Go Documentation"/></a>
   </p>
 </p>