diff --git a/build.gradle b/build.gradle
index 3f83b4d..e8ccd81 100644
--- a/build.gradle
+++ b/build.gradle
@@ -30,7 +30,7 @@ dependencies {
 	testImplementation group: 'net.openhft', name: 'zero-allocation-hashing', version: '0.16'
 	testImplementation group: 'com.appmattus.crypto', name: 'cryptohash', version: '1.0.2'
 	testImplementation group: 'org.greenrobot', name: 'essentials', version: '3.1.0'
-	errorprone("com.google.errorprone:error_prone_core:2.27.1")
+	errorprone("com.google.errorprone:error_prone_core:2.28.0")
 }
 
 multiRelease {
diff --git a/src/test/java/com/dynatrace/hash4j/hashing/AbstractHashSinkPutUnorderedIterableTest.java b/src/test/java/com/dynatrace/hash4j/hashing/AbstractHashSinkPutUnorderedIterableTest.java
index bc4fc65..55e071b 100644
--- a/src/test/java/com/dynatrace/hash4j/hashing/AbstractHashSinkPutUnorderedIterableTest.java
+++ b/src/test/java/com/dynatrace/hash4j/hashing/AbstractHashSinkPutUnorderedIterableTest.java
@@ -67,6 +67,7 @@ void testContributeUnorderedIterableViaLong() {
     assertThat(hash2a).isNotEqualTo(hash3a);
   }
 
+  @SuppressWarnings("UnnecessaryMethodReference")
   private static <T> Iterable<T> asIterable(Collection<T> collection) {
     return collection::iterator;
   }