diff --git a/appengine/standard/grpc/composer.json b/appengine/standard/grpc/composer.json
index 6fe6aca5b2..c45499a04a 100644
--- a/appengine/standard/grpc/composer.json
+++ b/appengine/standard/grpc/composer.json
@@ -1,6 +1,6 @@
 {
     "require": {
-        "google/cloud-spanner": "^1.15.0",
+        "google/cloud-spanner": "^2.0.0",
         "google/cloud-monitoring": "^2.0.0",
         "google/cloud-speech": "^2.0.0"
     },