diff --git a/pom.xml b/pom.xml
index f7181874a..7ec74bc67 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,7 @@
         <mockito.version>2.25.1</mockito.version>
 
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <TextSecureServer.version>5.20</TextSecureServer.version>
+        <TextSecureServer.version>5.21</TextSecureServer.version>
     </properties>
 
     <parent>