diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index 18f7f5ed0b3..afe101e5538 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -44,6 +44,5 @@ dependencies {
   implementation("gradle.plugin.io.morethan.jmhreport:gradle-jmh-report:0.9.6")
   implementation("me.champeau.jmh:jmh-gradle-plugin:0.7.3")
 
-  // earlier versions aren't compatible with Gradle 8.1.1
-  implementation("org.springframework.boot:spring-boot-gradle-plugin:2.5.12")
+  implementation("org.springframework.boot:spring-boot-gradle-plugin:3.5.6")
 }
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 1b33c55baab..8bdaf60c75a 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index d4081da476b..2e1113280ef 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/gradlew b/gradlew
index 23d15a93670..ef07e0162b1 100755
--- a/gradlew
+++ b/gradlew
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/smoke-tests/apps/gRPC/build.gradle.kts b/smoke-tests/apps/gRPC/build.gradle.kts
index eae03a2ecef..99802a6e67d 100644
--- a/smoke-tests/apps/gRPC/build.gradle.kts
+++ b/smoke-tests/apps/gRPC/build.gradle.kts
@@ -2,7 +2,7 @@ import com.google.protobuf.gradle.*
 
 plugins {
   id("ai.smoke-test-jar")
-  id("com.google.protobuf") version "0.8.19"
+  id("com.google.protobuf") version "0.9.5"
 }
 
 val grpcVersion = "1.26.0" // first version with support for arm64