diff --git a/pom.xml b/pom.xml
index c2fe987..8ed6cd1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -43,7 +43,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
         <!-- versions -->
-        <bouncy-castle.version>1.78</bouncy-castle.version>
+        <bouncy-castle.version>1.81</bouncy-castle.version>
         <nimbus-jose-jwt.version>10.3</nimbus-jose-jwt.version>
         <org.eclipse.paho.client.version>1.2.5</org.eclipse.paho.client.version>
         <jackson-databind.version>2.19.0</jackson-databind.version>