diff --git a/.github/workflows/conformance.yaml b/.github/workflows/conformance.yaml
index 33d05f71..21745f56 100644
--- a/.github/workflows/conformance.yaml
+++ b/.github/workflows/conformance.yaml
@@ -27,6 +27,7 @@ jobs:
           github.com:443
           objects.githubusercontent.com:443
           proxy.golang.org:443
+          release-assets.githubusercontent.com:443
           repo.maven.apache.org:443
           storage.googleapis.com:443
 
@@ -94,4 +95,4 @@ jobs:
         useBuildpacks: false
         validateConcurrency: true
         cmd: "'mvn -f invoker/conformance/pom.xml function:run -Drun.functionTarget=com.google.cloud.functions.conformance.ConcurrentHttpConformanceFunction'"
-        startDelay: 10
\ No newline at end of file
+        startDelay: 10