diff --git a/appengine/standard_python3/spanner/requirements.txt b/appengine/standard_python3/spanner/requirements.txt
index bbc1746a988..dfb2f0cd89c 100644
--- a/appengine/standard_python3/spanner/requirements.txt
+++ b/appengine/standard_python3/spanner/requirements.txt
@@ -1,2 +1,2 @@
-google-cloud-spanner==3.3.0
+google-cloud-spanner==3.4.0
 Flask==1.1.2
diff --git a/functions/spanner/requirements.txt b/functions/spanner/requirements.txt
index be40f51e64f..ade96e16c4c 100644
--- a/functions/spanner/requirements.txt
+++ b/functions/spanner/requirements.txt
@@ -1 +1 @@
-google-cloud-spanner==3.3.0
+google-cloud-spanner==3.4.0