diff --git a/src/js/sw/sdk/api-domains.js b/src/js/sw/sdk/api-domains.js
index 7d373b5..3fd0e25 100644
--- a/src/js/sw/sdk/api-domains.js
+++ b/src/js/sw/sdk/api-domains.js
@@ -256,7 +256,7 @@ export function createDomains(restClient) {
                 update:          (id, file) => rc.upload(`/api/v1/admin/packages/${id}/update`, file), // v0.5.4
                 exportPkg:       (id)       => `/api/v1/admin/packages/${id}/export`,                  // v0.5.4 (URL for window.open)
                 registry:        ()         => rc.get('/api/v1/admin/packages/registry'),
-                registryInstall: (url)      => rc.post('/api/v1/admin/packages/registry/install', { url }),
+                registryInstall: (url)      => rc.post('/api/v1/admin/packages/registry/install', { download_url: url }),
                 // v0.5.0: Extension permissions
                 permissions:     (id)       => rc.get(`/api/v1/admin/extensions/${id}/permissions`),
                 grantPerm:       (id, perm) => rc.post(`/api/v1/admin/extensions/${id}/permissions/${perm}/grant`, {}),