diff --git a/Spanner/VERSION b/Spanner/VERSION
index 3e1ad720b13d..8e03717dca27 100644
--- a/Spanner/VERSION
+++ b/Spanner/VERSION
@@ -1 +1 @@
-1.5.0
\ No newline at end of file
+1.5.1
\ No newline at end of file
diff --git a/Spanner/src/SpannerClient.php b/Spanner/src/SpannerClient.php
index c65344fc36d0..4db9d22a4b67 100644
--- a/Spanner/src/SpannerClient.php
+++ b/Spanner/src/SpannerClient.php
@@ -77,7 +77,7 @@ class SpannerClient
     use LROTrait;
     use ValidateTrait;
 
-    const VERSION = '1.5.0';
+    const VERSION = '1.5.1';
 
     const FULL_CONTROL_SCOPE = 'https://www.googleapis.com/auth/spanner.data';
     const ADMIN_SCOPE = 'https://www.googleapis.com/auth/spanner.admin';
diff --git a/composer.json b/composer.json
index 9742963474e3..57aa5474fcbf 100644
--- a/composer.json
+++ b/composer.json
@@ -84,7 +84,7 @@
         "google/cloud-oslogin": "0.4.0",
         "google/cloud-pubsub": "1.2.0",
         "google/cloud-redis": "0.2.0",
-        "google/cloud-spanner": "1.5.0",
+        "google/cloud-spanner": "1.5.1",
         "google/cloud-speech": "0.14.0",
         "google/cloud-storage": "1.5.0",
         "google/cloud-trace": "0.8.0",
diff --git a/docs/manifest.json b/docs/manifest.json
index 5eaed8dfc450..8b207f27ced9 100644
--- a/docs/manifest.json
+++ b/docs/manifest.json
@@ -11,6 +11,7 @@
             "name": "google/cloud",
             "defaultService": "servicebuilder",
             "versions": [
+                "v0.66.1",
                 "v0.66.0",
                 "v0.65.0",
                 "v0.64.0",
@@ -587,6 +588,7 @@
             "name": "google/cloud-spanner",
             "defaultService": "spanner/spannerclient",
             "versions": [
+                "v1.5.1",
                 "v1.5.0",
                 "v1.4.1",
                 "v1.4.0",
diff --git a/src/ServiceBuilder.php b/src/ServiceBuilder.php
index f253ed80074f..bea3831c2a16 100644
--- a/src/ServiceBuilder.php
+++ b/src/ServiceBuilder.php
@@ -30,5 +30,5 @@ class ServiceBuilder extends CoreServiceBuilder
     /**
      * @deprecated
      */
-    const VERSION = '0.66.0';
+    const VERSION = '0.66.1';
 }
diff --git a/src/Version.php b/src/Version.php
index a11d7e43d663..16fcfb808589 100644
--- a/src/Version.php
+++ b/src/Version.php
@@ -22,5 +22,5 @@
  */
 class Version
 {
-    const VERSION = '0.66.0';
+    const VERSION = '0.66.1';
 }