diff --git a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/messaging/HeaderBasedMessagingExtractor.java b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/messaging/HeaderBasedMessagingExtractor.java
index dc464b74a..1848fa0db 100644
--- a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/messaging/HeaderBasedMessagingExtractor.java
+++ b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/messaging/HeaderBasedMessagingExtractor.java
@@ -15,6 +15,8 @@ import org.springframework.cloud.sleuth.util.TextMapUtil;
  */
 public class HeaderBasedMessagingExtractor implements MessagingSpanTextMapExtractor {
 
+	private final Random random = new Random();
+
 	@Override
 	public Span joinTrace(SpanTextMap textMap) {
 		Map<String, String> carrier = TextMapUtil.asMap(textMap);
@@ -37,7 +39,7 @@ public class HeaderBasedMessagingExtractor implements MessagingSpanTextMapExtrac
 	private String generateTraceIdIfMissing(Map<String, String> carrier,
 			boolean traceIdMissing) {
 		if (traceIdMissing) {
-			carrier.put(TraceMessageHeaders.TRACE_ID_NAME, Span.idToHex(new Random().nextLong()));
+			carrier.put(TraceMessageHeaders.TRACE_ID_NAME, Span.idToHex(this.random.nextLong()));
 		}
 		return carrier.get(TraceMessageHeaders.TRACE_ID_NAME);
 	}
diff --git a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/web/ZipkinHttpSpanExtractor.java b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/web/ZipkinHttpSpanExtractor.java
index 9881182b9..ef19978fc 100644
--- a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/web/ZipkinHttpSpanExtractor.java
+++ b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/web/ZipkinHttpSpanExtractor.java
@@ -26,6 +26,7 @@ public class ZipkinHttpSpanExtractor implements HttpSpanExtractor {
 	private static final String HTTP_COMPONENT = "http";
 
 	private final Pattern skipPattern;
+	private final Random random = new Random();
 
 	public ZipkinHttpSpanExtractor(Pattern skipPattern) {
 		this.skipPattern = skipPattern;
@@ -70,7 +71,7 @@ public class ZipkinHttpSpanExtractor implements HttpSpanExtractor {
 
 	private void generateIdIfMissing(Map<String, String> carrier, String key) {
 		if (!carrier.containsKey(key)) {
-			carrier.put(key, Span.idToHex(new Random().nextLong()));
+			carrier.put(key, Span.idToHex(this.random.nextLong()));
 		}
 	}