diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index ed9faea0..0995e903 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -19,10 +19,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
 
       - name: Set Docker API version
@@ -67,10 +67,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
 
       - name: Set Docker API version
@@ -86,7 +86,7 @@ jobs:
         uses: dev-vince/actions-publish-javadoc@4004c6ca5881690e83c49a28a0b16fcab089e860 # v1.0.1
         with:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          java-version: "17"
+          java-version: "21"
           java-distribution: "adopt" # The distributor of the target JDK. See https://github.com/actions/setup-java for more information.
           project: gradle # The project type.
           branch: "gh-pages" # The branch for the javadoc contents.
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1f2cb86f..190dcd59 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,10 +21,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
 
       - name: Set Docker API version
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 71a7829d..7f4db1e3 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -63,7 +63,7 @@ and emitted into the `build/generated/source directory`, and included in compila
 
 Ensure the following are installed and available in the `PATH`.
 
-- [Java 17](https://www.azul.com/downloads/?version=java-17-lts&package=jdk#zulu)
+- [Java 21](https://www.azul.com/downloads/?version=java-21-lts&package=jdk#zulu)
 - [Gradle](https://gradle.org/install/#with-a-package-manager).
 - [Docker](https://docs.docker.com/engine/install/) for tests.
 
diff --git a/build.gradle b/build.gradle
index 38f55c02..419d506a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -18,7 +18,7 @@ plugins {
 	id 'signing'
 	id 'maven-publish'
 
-	id 'com.google.protobuf' version '0.9.4'
+	id 'com.google.protobuf' version '0.10.0'
 	id 'net.ltgt.errorprone' version '5.1.0'
 	id 'io.github.gradle-nexus.publish-plugin' version '2.0.0'
 	id 'com.diffplug.spotless' version '6.22.0'
@@ -79,14 +79,14 @@ jar {
 	}
 }
 
-def grpcVersion = '1.75.0'
+def grpcVersion = '1.81.0'
 def protocVersion = '3.25.5'
-def slf4jVersion = '2.0.14'
-def testcontainersVersion = '1.20.1'
+def slf4jVersion = '2.0.18'
+def testcontainersVersion = '1.21.4'
 def jUnitVersion = '6.1.0'
 
 dependencies {
-	errorprone "com.uber.nullaway:nullaway:0.10.18"
+	errorprone "com.uber.nullaway:nullaway:0.13.6"
 
 	api "io.grpc:grpc-protobuf:${grpcVersion}"
 	api "io.grpc:grpc-stub:${grpcVersion}"
@@ -94,7 +94,7 @@ dependencies {
 
 	compileOnly "org.apache.tomcat:annotations-api:6.0.53"
 
-	errorprone "com.google.errorprone:error_prone_core:2.29.2"
+	errorprone "com.google.errorprone:error_prone_core:2.49.0"
 
 	runtimeOnly "io.grpc:grpc-netty-shaded:${grpcVersion}"
 
@@ -164,6 +164,10 @@ extractIncludeProto {
 	dependsOn downloadProtos
 }
 
+processProtoResources {
+	dependsOn downloadProtos
+}
+
 protobuf {
 	protoc { artifact = "com.google.protobuf:protoc:${protocVersion}" }
 	plugins {
diff --git a/buildSrc/build.gradle b/buildSrc/build.gradle
index d90e0954..1f6020f3 100644
--- a/buildSrc/build.gradle
+++ b/buildSrc/build.gradle
@@ -1,7 +1,7 @@
 dependencies {
-	implementation 'org.ajoberstar.grgit:grgit-gradle:5.0.0'
+	implementation 'org.ajoberstar.grgit:grgit-gradle:5.3.3'
 	implementation 'org.apache.httpcomponents:httpclient:4.5.14'
-	implementation 'org.apache.commons:commons-compress:1.23.0'
+	implementation 'org.apache.commons:commons-compress:1.28.0'
 }
 
 repositories {