diff --git a/Makefile b/Makefile
index b44aa8b91..4cae3883d 100644
--- a/Makefile
+++ b/Makefile
@@ -80,7 +80,7 @@ build-codedeploy-artifact: ## Build the deploy artifact for CodeDeploy
 
 .PHONY: upload-codedeploy-artifact ## Upload the deploy artifact for CodeDeploy
 upload-codedeploy-artifact: check-env-vars
-	aws s3 cp --region eu-west-1 target/notifications-admin.zip s3://${DNS_NAME}-codedeploy/${CODEDEPLOY_PREFIX}-${DEPLOY_BUILD_NUMBER}.zip
+	aws s3 cp --region eu-west-1 --sse AES256 target/notifications-admin.zip s3://${DNS_NAME}-codedeploy/${CODEDEPLOY_PREFIX}-${DEPLOY_BUILD_NUMBER}.zip
 
 .PHONY: test
 test: venv ## Run tests