diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 1d091234..e886d28d 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -7,7 +7,7 @@ guava = "32.1.3-jre"
 assertj = "3.24.2"
 junit = "5.10.1"
 testcontainers = "1.19.3"
-protoc = "3.24.4"
+protoc = "3.25.1"
 failsafe = "3.3.2"
 awaitility = "4.2.0"
 commonsIo = "2.15.1"
@@ -18,15 +18,15 @@ vertx = "4.5.1"
 picocli = "4.7.5"
 restAssured = "5.4.0"
 
-versionsPlugin = "0.49.0"
+versionsPlugin = "0.50.0"
 errorPronePlugin = "3.1.0"
-spotlessPlugin = "6.22.0"
+spotlessPlugin = "6.23.3"
 shadowPlugin = "8.1.1"
 testLoggerPlugin = "4.0.0"
 protobufPlugin = "0.9.4"
 nexusPublishPlugin = "1.3.0"
-axionReleasePlugin = "1.15.5"
-testRetryPlugin = "1.5.6"
+axionReleasePlugin = "1.16.1"
+testRetryPlugin = "1.5.8"
 
 [libraries]
 slf4j = { module = "org.slf4j:slf4j-api", version.ref = "slf4j" }
diff --git a/jetcd-core/src/test/java/io/etcd/jetcd/impl/LeaseMemoryLeakTest.java b/jetcd-core/src/test/java/io/etcd/jetcd/impl/LeaseMemoryLeakTest.java
index 829ce9ce..a29e74a3 100644
--- a/jetcd-core/src/test/java/io/etcd/jetcd/impl/LeaseMemoryLeakTest.java
+++ b/jetcd-core/src/test/java/io/etcd/jetcd/impl/LeaseMemoryLeakTest.java
@@ -97,7 +97,7 @@ public void testKeepAliveOnceMemoryLeak() throws Exception {
             int start = extractGoRoutinesCount(uri);
             assertThat(start).isGreaterThan(0);
 
-            scheduler.scheduleAtFixedRate(() -> {
+            var unused = scheduler.scheduleAtFixedRate(() -> {
                 try {
                     if (latch.getCount() == 0) {
                         return;