diff --git a/logstash-core/src/main/java/org/logstash/health/ProbeIndicator.java b/logstash-core/src/main/java/org/logstash/health/ProbeIndicator.java
index 290175b832b..ddb4fce6c4b 100644
--- a/logstash-core/src/main/java/org/logstash/health/ProbeIndicator.java
+++ b/logstash-core/src/main/java/org/logstash/health/ProbeIndicator.java
@@ -25,7 +25,13 @@
 import org.apache.logging.log4j.Logger;
 
 import java.io.IOException;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.Supplier;