diff --git a/tracing/src/main/java/com/palantir/tracing/Tracer.java b/tracing/src/main/java/com/palantir/tracing/Tracer.java
index 11a5653f9..fb879d290 100644
--- a/tracing/src/main/java/com/palantir/tracing/Tracer.java
+++ b/tracing/src/main/java/com/palantir/tracing/Tracer.java
@@ -697,6 +697,7 @@ public static synchronized SpanObserver subscribe(String name, SpanObserver obse
      * The inverse of {@link #subscribe}: removes the observer registered for the given name. Returns the removed
      * observer if it existed, or null otherwise.
      */
+    @SuppressWarnings("for-rollout:NullAway")
     public static synchronized SpanObserver unsubscribe(String name) {
         SpanObserver removedObserver = observers.remove(name);
         computeObserversList();
diff --git a/versions.props b/versions.props
index 6b41c0d33..d52076c94 100644
--- a/versions.props
+++ b/versions.props
@@ -26,7 +26,7 @@ com.fasterxml.jackson.core:jackson-annotations = 2.22
 com.palantir.conjure.java.runtime:* = 8.39.0
 com.palantir.tritium:* = 0.136.0
 com.spotify.dataenum:* = 1.4.1
-com.uber.nullaway:nullaway = 0.13.4
+com.uber.nullaway:nullaway = 0.13.8
 org.apache.httpcomponents.client5:* = 5.6.4
 org.apache.logging.log4j:* = 2.24.0
 org.assertj:* = 3.27.7