diff --git a/benchmarks/pom.xml b/benchmarks/pom.xml
index ebe4fb5af6..c82802c87d 100644
--- a/benchmarks/pom.xml
+++ b/benchmarks/pom.xml
@@ -85,7 +85,7 @@
     <dependency>
       <groupId>io.opentelemetry</groupId>
       <artifactId>opentelemetry-bom</artifactId>
-      <version>1.44.1</version>
+      <version>1.46.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
diff --git a/generation_config.yaml b/generation_config.yaml
index 28f408df69..8e3bf93014 100644
--- a/generation_config.yaml
+++ b/generation_config.yaml
@@ -1,5 +1,5 @@
-gapic_generator_version: 2.51.0
-googleapis_commitish: 00196e2a68b16a864c57db2e870822875a7f1198
+gapic_generator_version: 2.51.1
+googleapis_commitish: d581bbe1a66ad2e47eda2beebf6200f23b766ca9
 libraries_bom_version: 26.52.0
 libraries:
   - api_shortname: spanner
diff --git a/google-cloud-spanner/src/main/java/com/google/cloud/spanner/SpannerOptions.java b/google-cloud-spanner/src/main/java/com/google/cloud/spanner/SpannerOptions.java
index 1d0c702cdf..42fc0c2d0b 100644
--- a/google-cloud-spanner/src/main/java/com/google/cloud/spanner/SpannerOptions.java
+++ b/google-cloud-spanner/src/main/java/com/google/cloud/spanner/SpannerOptions.java
@@ -741,7 +741,20 @@ protected SpannerOptions(Builder builder) {
 
     transportChannelExecutorThreadNameFormat = builder.transportChannelExecutorThreadNameFormat;
     channelProvider = builder.channelProvider;
-    channelConfigurator = builder.channelConfigurator;
+    if (builder.mTLSContext != null) {
+      channelConfigurator =
+          channelBuilder -> {
+            if (builder.channelConfigurator != null) {
+              channelBuilder = builder.channelConfigurator.apply(channelBuilder);
+            }
+            if (channelBuilder instanceof NettyChannelBuilder) {
+              ((NettyChannelBuilder) channelBuilder).sslContext(builder.mTLSContext);
+            }
+            return channelBuilder;
+          };
+    } else {
+      channelConfigurator = builder.channelConfigurator;
+    }
     interceptorProvider = builder.interceptorProvider;
     sessionPoolOptions =
         builder.sessionPoolOptions != null
@@ -1620,15 +1633,6 @@ public SpannerOptions build() {
         // As we are using plain text, we should never send any credentials.
         this.setCredentials(NoCredentials.getInstance());
       }
-      if (mTLSContext != null) {
-        this.setChannelConfigurator(
-            builder -> {
-              if (builder instanceof NettyChannelBuilder) {
-                ((NettyChannelBuilder) builder).sslContext(mTLSContext);
-              }
-              return builder;
-            });
-      }
       if (this.numChannels == null) {
         this.numChannels =
             this.grpcGcpExtensionEnabled ? GRPC_GCP_ENABLED_DEFAULT_CHANNELS : DEFAULT_CHANNELS;
diff --git a/samples/snippets/pom.xml b/samples/snippets/pom.xml
index f78c2d3b30..7873c36902 100644
--- a/samples/snippets/pom.xml
+++ b/samples/snippets/pom.xml
@@ -34,7 +34,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>libraries-bom</artifactId>
-        <version>26.50.0</version>
+        <version>26.53.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>