diff --git a/pom.xml b/pom.xml
index 726b8c0..678df0c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -96,7 +96,7 @@ SPDX-License-Identifier: Apache-2.0
         <errorprone.version>2.50.0</errorprone.version>
         <nullaway.version>0.13.7</nullaway.version>
         <jspecify.version>1.0.0</jspecify.version>
-        <checker.version>4.2.0</checker.version>
+        <checker.version>4.2.1</checker.version>
         <!-- DO NOT UPGRADE jqwik past 1.9.3. jqwik 1.10.0 added a deliberate
              anti-AI prompt-injection string to test stdout; the 1.10.1 user
              guide states the library "is not meant to be used by any 'AI'