diff --git a/appengine/standard_python3/spanner/requirements.txt b/appengine/standard_python3/spanner/requirements.txt
index 28d23cb1458..64e0a6cb257 100644
--- a/appengine/standard_python3/spanner/requirements.txt
+++ b/appengine/standard_python3/spanner/requirements.txt
@@ -1,2 +1,2 @@
-google-cloud-spanner==3.14.1
+google-cloud-spanner==3.15.0
 Flask==2.1.0
diff --git a/functions/spanner/requirements.txt b/functions/spanner/requirements.txt
index 570bc4e0389..eb6df836d3d 100644
--- a/functions/spanner/requirements.txt
+++ b/functions/spanner/requirements.txt
@@ -1 +1 @@
-google-cloud-spanner==3.14.1
+google-cloud-spanner==3.15.0