diff --git a/pom.xml b/pom.xml
index ea5a7bf5..4cb30229 100644
--- a/pom.xml
+++ b/pom.xml
@@ -111,7 +111,7 @@
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>animal-sniffer-maven-plugin</artifactId>
-        <version>1.20</version>
+        <version>1.21</version>
         <configuration>
           <signature>
             <groupId>org.codehaus.mojo.signature</groupId>