diff --git a/Makefile b/Makefile
index 810176a4b..b025fb5bd 100644
--- a/Makefile
+++ b/Makefile
@@ -25,7 +25,7 @@ test-integ: test
 
 version ?= latest
 test-docker:
-	curl -s https://raw.githubusercontent.com/sendgrid/sendgrid-oai/master/prism/prism.sh -o prism.sh
+	curl -s https://raw.githubusercontent.com/sendgrid/sendgrid-oai/main/prism/prism.sh -o prism.sh
 	dependencies=lowest version=$(version) bash ./prism.sh
 	dependencies=highest version=$(version) bash ./prism.sh