diff --git a/MODULE.bazel b/MODULE.bazel
index 14f6ba4f89..b0c923c0c3 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -2,7 +2,7 @@ module(
     name = "grpc-java",
     compatibility_level = 0,
     repo_name = "io_grpc_grpc_java",
-    version = "1.67.0-SNAPSHOT",  # CURRENT_GRPC_VERSION
+    version = "1.66.0-SNAPSHOT",  # CURRENT_GRPC_VERSION
 )
 
 # GRPC_DEPS_START
diff --git a/build.gradle b/build.gradle
index 74cfacb800..76449ec010 100644
--- a/build.gradle
+++ b/build.gradle
@@ -21,7 +21,7 @@ subprojects {
     apply plugin: "net.ltgt.errorprone"
 
     group = "io.grpc"
-    version = "1.67.0-SNAPSHOT" // CURRENT_GRPC_VERSION
+    version = "1.66.0-SNAPSHOT" // CURRENT_GRPC_VERSION
 
     repositories {
         maven { // The google mirror is less flaky than mavenCentral()
diff --git a/compiler/src/test/golden/TestDeprecatedService.java.txt b/compiler/src/test/golden/TestDeprecatedService.java.txt
index 75e9e0b47e..5666abe8fd 100644
--- a/compiler/src/test/golden/TestDeprecatedService.java.txt
+++ b/compiler/src/test/golden/TestDeprecatedService.java.txt
@@ -8,7 +8,7 @@ import static io.grpc.MethodDescriptor.generateFullMethodName;
  * </pre>
  */
 @javax.annotation.Generated(
-    value = "by gRPC proto compiler (version 1.67.0-SNAPSHOT)",
+    value = "by gRPC proto compiler (version 1.66.0-SNAPSHOT)",
     comments = "Source: grpc/testing/compiler/test.proto")
 @io.grpc.stub.annotations.GrpcGenerated
 @java.lang.Deprecated
diff --git a/compiler/src/test/golden/TestService.java.txt b/compiler/src/test/golden/TestService.java.txt
index 3852b6ee54..52e2a77241 100644
--- a/compiler/src/test/golden/TestService.java.txt
+++ b/compiler/src/test/golden/TestService.java.txt
@@ -8,7 +8,7 @@ import static io.grpc.MethodDescriptor.generateFullMethodName;
  * </pre>
  */
 @javax.annotation.Generated(
-    value = "by gRPC proto compiler (version 1.67.0-SNAPSHOT)",
+    value = "by gRPC proto compiler (version 1.66.0-SNAPSHOT)",
     comments = "Source: grpc/testing/compiler/test.proto")
 @io.grpc.stub.annotations.GrpcGenerated
 public final class TestServiceGrpc {
diff --git a/core/src/main/java/io/grpc/internal/GrpcUtil.java b/core/src/main/java/io/grpc/internal/GrpcUtil.java
index 593bdbce13..fa488f30ef 100644
--- a/core/src/main/java/io/grpc/internal/GrpcUtil.java
+++ b/core/src/main/java/io/grpc/internal/GrpcUtil.java
@@ -219,7 +219,7 @@ public final class GrpcUtil {
 
   public static final Splitter ACCEPT_ENCODING_SPLITTER = Splitter.on(',').trimResults();
 
-  public static final String IMPLEMENTATION_VERSION = "1.67.0-SNAPSHOT"; // CURRENT_GRPC_VERSION
+  public static final String IMPLEMENTATION_VERSION = "1.66.0-SNAPSHOT"; // CURRENT_GRPC_VERSION
 
   /**
    * The default timeout in nanos for a keepalive ping request.
diff --git a/examples/android/clientcache/app/build.gradle b/examples/android/clientcache/app/build.gradle
index 0ca032fb0e..64e95de473 100644
--- a/examples/android/clientcache/app/build.gradle
+++ b/examples/android/clientcache/app/build.gradle
@@ -34,7 +34,7 @@ android {
 protobuf {
     protoc { artifact = 'com.google.protobuf:protoc:3.25.1' }
     plugins {
-        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
@@ -54,12 +54,12 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.0.0'
 
     // You need to build grpc-java to obtain these libraries below.
-    implementation 'io.grpc:grpc-okhttp:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    implementation 'io.grpc:grpc-protobuf-lite:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    implementation 'io.grpc:grpc-stub:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-okhttp:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-protobuf-lite:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-stub:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
     implementation 'org.apache.tomcat:annotations-api:6.0.53'
 
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'com.google.truth:truth:1.1.5'
-    testImplementation 'io.grpc:grpc-testing:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    testImplementation 'io.grpc:grpc-testing:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 }
diff --git a/examples/android/helloworld/app/build.gradle b/examples/android/helloworld/app/build.gradle
index 0f1e8b4047..f9433f1401 100644
--- a/examples/android/helloworld/app/build.gradle
+++ b/examples/android/helloworld/app/build.gradle
@@ -32,7 +32,7 @@ android {
 protobuf {
     protoc { artifact = 'com.google.protobuf:protoc:3.25.1' }
     plugins {
-        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
@@ -52,8 +52,8 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.0.0'
 
     // You need to build grpc-java to obtain these libraries below.
-    implementation 'io.grpc:grpc-okhttp:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    implementation 'io.grpc:grpc-protobuf-lite:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    implementation 'io.grpc:grpc-stub:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-okhttp:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-protobuf-lite:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-stub:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
     implementation 'org.apache.tomcat:annotations-api:6.0.53'
 }
diff --git a/examples/android/routeguide/app/build.gradle b/examples/android/routeguide/app/build.gradle
index c33135233e..2431b473f2 100644
--- a/examples/android/routeguide/app/build.gradle
+++ b/examples/android/routeguide/app/build.gradle
@@ -32,7 +32,7 @@ android {
 protobuf {
     protoc { artifact = 'com.google.protobuf:protoc:3.25.1' }
     plugins {
-        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
@@ -52,8 +52,8 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.0.0'
 
     // You need to build grpc-java to obtain these libraries below.
-    implementation 'io.grpc:grpc-okhttp:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    implementation 'io.grpc:grpc-protobuf-lite:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    implementation 'io.grpc:grpc-stub:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-okhttp:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-protobuf-lite:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-stub:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
     implementation 'org.apache.tomcat:annotations-api:6.0.53'
 }
diff --git a/examples/android/strictmode/app/build.gradle b/examples/android/strictmode/app/build.gradle
index e8e2e8cac2..699c8dd9d6 100644
--- a/examples/android/strictmode/app/build.gradle
+++ b/examples/android/strictmode/app/build.gradle
@@ -33,7 +33,7 @@ android {
 protobuf {
     protoc { artifact = 'com.google.protobuf:protoc:3.25.1' }
     plugins {
-        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
@@ -53,8 +53,8 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.0.0'
 
     // You need to build grpc-java to obtain these libraries below.
-    implementation 'io.grpc:grpc-okhttp:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    implementation 'io.grpc:grpc-protobuf-lite:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    implementation 'io.grpc:grpc-stub:1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-okhttp:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-protobuf-lite:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-stub:1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
     implementation 'org.apache.tomcat:annotations-api:6.0.53'
 }
diff --git a/examples/build.gradle b/examples/build.gradle
index 076e0c4a25..c9213cc6a2 100644
--- a/examples/build.gradle
+++ b/examples/build.gradle
@@ -23,7 +23,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protobufVersion = '3.25.3'
 def protocVersion = protobufVersion
 
diff --git a/examples/example-alts/build.gradle b/examples/example-alts/build.gradle
index 3c998586bb..06b7ac501d 100644
--- a/examples/example-alts/build.gradle
+++ b/examples/example-alts/build.gradle
@@ -24,7 +24,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protocVersion = '3.25.3'
 
 dependencies {
diff --git a/examples/example-debug/build.gradle b/examples/example-debug/build.gradle
index ca151a13c1..624483f663 100644
--- a/examples/example-debug/build.gradle
+++ b/examples/example-debug/build.gradle
@@ -25,7 +25,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protobufVersion = '3.25.3'
 
 dependencies {
diff --git a/examples/example-debug/pom.xml b/examples/example-debug/pom.xml
index 10ccf834d8..5aa8065ad3 100644
--- a/examples/example-debug/pom.xml
+++ b/examples/example-debug/pom.xml
@@ -6,13 +6,13 @@
   <packaging>jar</packaging>
   <!-- Feel free to delete the comment at the end of these lines. It is just
        for safely updating the version in our release process. -->
-  <version>1.67.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
+  <version>1.66.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
   <name>example-debug</name>
   <url>https://github.com/grpc/grpc-java</url>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <grpc.version>1.67.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
+    <grpc.version>1.66.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
     <protoc.version>3.25.3</protoc.version>
     <!-- required for jdk9 -->
     <maven.compiler.source>1.8</maven.compiler.source>
diff --git a/examples/example-gauth/build.gradle b/examples/example-gauth/build.gradle
index 40e72afad8..c43443c386 100644
--- a/examples/example-gauth/build.gradle
+++ b/examples/example-gauth/build.gradle
@@ -24,7 +24,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protobufVersion = '3.25.3'
 def protocVersion = protobufVersion
 
diff --git a/examples/example-gauth/pom.xml b/examples/example-gauth/pom.xml
index 1e58e21e97..d91eeb15de 100644
--- a/examples/example-gauth/pom.xml
+++ b/examples/example-gauth/pom.xml
@@ -6,13 +6,13 @@
   <packaging>jar</packaging>
   <!-- Feel free to delete the comment at the end of these lines. It is just
        for safely updating the version in our release process. -->
-  <version>1.67.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
+  <version>1.66.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
   <name>example-gauth</name>
   <url>https://github.com/grpc/grpc-java</url>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <grpc.version>1.67.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
+    <grpc.version>1.66.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
     <protobuf.version>3.25.3</protobuf.version>
     <!-- required for jdk9 -->
     <maven.compiler.source>1.8</maven.compiler.source>
diff --git a/examples/example-gcp-csm-observability/build.gradle b/examples/example-gcp-csm-observability/build.gradle
index 5de2b1995e..a24490918b 100644
--- a/examples/example-gcp-csm-observability/build.gradle
+++ b/examples/example-gcp-csm-observability/build.gradle
@@ -25,7 +25,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protocVersion = '3.25.3'
 def openTelemetryVersion = '1.40.0'
 def openTelemetryPrometheusVersion = '1.40.0-alpha'
diff --git a/examples/example-gcp-observability/build.gradle b/examples/example-gcp-observability/build.gradle
index 0462c987f5..d6dd1aedc6 100644
--- a/examples/example-gcp-observability/build.gradle
+++ b/examples/example-gcp-observability/build.gradle
@@ -25,7 +25,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protocVersion = '3.25.3'
 
 dependencies {
diff --git a/examples/example-hostname/build.gradle b/examples/example-hostname/build.gradle
index ab45ee2dc5..ee5e5cf5c7 100644
--- a/examples/example-hostname/build.gradle
+++ b/examples/example-hostname/build.gradle
@@ -23,7 +23,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protobufVersion = '3.25.3'
 
 dependencies {
diff --git a/examples/example-hostname/pom.xml b/examples/example-hostname/pom.xml
index 19b5f8b3c2..05131b8997 100644
--- a/examples/example-hostname/pom.xml
+++ b/examples/example-hostname/pom.xml
@@ -6,13 +6,13 @@
   <packaging>jar</packaging>
   <!-- Feel free to delete the comment at the end of these lines. It is just
        for safely updating the version in our release process. -->
-  <version>1.67.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
+  <version>1.66.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
   <name>example-hostname</name>
   <url>https://github.com/grpc/grpc-java</url>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <grpc.version>1.67.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
+    <grpc.version>1.66.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
     <protoc.version>3.25.3</protoc.version>
     <!-- required for jdk9 -->
     <maven.compiler.source>1.8</maven.compiler.source>
diff --git a/examples/example-jwt-auth/build.gradle b/examples/example-jwt-auth/build.gradle
index 6fdd4498c7..2ad3c91f19 100644
--- a/examples/example-jwt-auth/build.gradle
+++ b/examples/example-jwt-auth/build.gradle
@@ -23,7 +23,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protobufVersion = '3.25.3'
 def protocVersion = protobufVersion
 
diff --git a/examples/example-jwt-auth/pom.xml b/examples/example-jwt-auth/pom.xml
index ad530e33aa..01cf0edce2 100644
--- a/examples/example-jwt-auth/pom.xml
+++ b/examples/example-jwt-auth/pom.xml
@@ -7,13 +7,13 @@
   <packaging>jar</packaging>
   <!-- Feel free to delete the comment at the end of these lines. It is just
        for safely updating the version in our release process. -->
-  <version>1.67.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
+  <version>1.66.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
   <name>example-jwt-auth</name>
   <url>https://github.com/grpc/grpc-java</url>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <grpc.version>1.67.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
+    <grpc.version>1.66.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
     <protobuf.version>3.25.3</protobuf.version>
     <protoc.version>3.25.3</protoc.version>
     <!-- required for jdk9 -->
diff --git a/examples/example-oauth/build.gradle b/examples/example-oauth/build.gradle
index 255633b4f9..23a6633e26 100644
--- a/examples/example-oauth/build.gradle
+++ b/examples/example-oauth/build.gradle
@@ -23,7 +23,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protobufVersion = '3.25.3'
 def protocVersion = protobufVersion
 
diff --git a/examples/example-oauth/pom.xml b/examples/example-oauth/pom.xml
index 2c38a05b3e..afd45aecd3 100644
--- a/examples/example-oauth/pom.xml
+++ b/examples/example-oauth/pom.xml
@@ -7,13 +7,13 @@
   <packaging>jar</packaging>
   <!-- Feel free to delete the comment at the end of these lines. It is just
        for safely updating the version in our release process. -->
-  <version>1.67.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
+  <version>1.66.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
   <name>example-oauth</name>
   <url>https://github.com/grpc/grpc-java</url>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <grpc.version>1.67.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
+    <grpc.version>1.66.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
     <protobuf.version>3.25.3</protobuf.version>
     <protoc.version>3.25.3</protoc.version>
     <!-- required for jdk9 -->
diff --git a/examples/example-opentelemetry/build.gradle b/examples/example-opentelemetry/build.gradle
index 00f7dc101b..55d6685d77 100644
--- a/examples/example-opentelemetry/build.gradle
+++ b/examples/example-opentelemetry/build.gradle
@@ -24,7 +24,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protocVersion = '3.25.3'
 def openTelemetryVersion = '1.40.0'
 def openTelemetryPrometheusVersion = '1.40.0-alpha'
diff --git a/examples/example-orca/build.gradle b/examples/example-orca/build.gradle
index 22feb8cae4..f3eae10ace 100644
--- a/examples/example-orca/build.gradle
+++ b/examples/example-orca/build.gradle
@@ -18,7 +18,7 @@ java {
     targetCompatibility = JavaVersion.VERSION_1_8
 }
 
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protocVersion = '3.25.3'
 
 dependencies {
diff --git a/examples/example-reflection/build.gradle b/examples/example-reflection/build.gradle
index 7882139191..0b5c99898e 100644
--- a/examples/example-reflection/build.gradle
+++ b/examples/example-reflection/build.gradle
@@ -18,7 +18,7 @@ java {
     targetCompatibility = JavaVersion.VERSION_1_8
 }
 
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protocVersion = '3.25.3'
 
 dependencies {
diff --git a/examples/example-servlet/build.gradle b/examples/example-servlet/build.gradle
index 9542ba0277..b73d21fbc4 100644
--- a/examples/example-servlet/build.gradle
+++ b/examples/example-servlet/build.gradle
@@ -16,7 +16,7 @@ java {
     targetCompatibility = JavaVersion.VERSION_1_8
 }
 
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protocVersion = '3.25.3'
 
 dependencies {
diff --git a/examples/example-tls/build.gradle b/examples/example-tls/build.gradle
index 94257af475..3791cc0327 100644
--- a/examples/example-tls/build.gradle
+++ b/examples/example-tls/build.gradle
@@ -24,7 +24,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protocVersion = '3.25.3'
 
 dependencies {
diff --git a/examples/example-tls/pom.xml b/examples/example-tls/pom.xml
index bc9c0a7a8e..1263b34703 100644
--- a/examples/example-tls/pom.xml
+++ b/examples/example-tls/pom.xml
@@ -6,13 +6,13 @@
   <packaging>jar</packaging>
   <!-- Feel free to delete the comment at the end of these lines. It is just
        for safely updating the version in our release process. -->
-  <version>1.67.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
+  <version>1.66.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
   <name>example-tls</name>
   <url>https://github.com/grpc/grpc-java</url>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <grpc.version>1.67.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
+    <grpc.version>1.66.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
     <protoc.version>3.25.3</protoc.version>
     <!-- required for jdk9 -->
     <maven.compiler.source>1.8</maven.compiler.source>
diff --git a/examples/example-xds/build.gradle b/examples/example-xds/build.gradle
index 2554adb003..9807b1f8b7 100644
--- a/examples/example-xds/build.gradle
+++ b/examples/example-xds/build.gradle
@@ -23,7 +23,7 @@ java {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.67.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.66.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def protocVersion = '3.25.3'
 
 dependencies {
diff --git a/examples/pom.xml b/examples/pom.xml
index 2b25d13b50..a71e9d449c 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -6,13 +6,13 @@
   <packaging>jar</packaging>
   <!-- Feel free to delete the comment at the end of these lines. It is just
        for safely updating the version in our release process. -->
-  <version>1.67.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
+  <version>1.66.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
   <name>examples</name>
   <url>https://github.com/grpc/grpc-java</url>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <grpc.version>1.67.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
+    <grpc.version>1.66.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
     <protobuf.version>3.25.3</protobuf.version>
     <protoc.version>3.25.3</protoc.version>
     <!-- required for JDK 8 -->