diff --git a/Makefile b/Makefile
index e2c9ac1c0..589db6992 100644
--- a/Makefile
+++ b/Makefile
@@ -33,7 +33,7 @@ aws-codegen:
 
 .PHONY: k8s-codegen
 k8s-codegen:
-	./hack/update-codegen.sh
+	bash ./hack/update-codegen.sh
 
 .PHONY: codegen
 codegen: aws-codegen k8s-codegen