diff --git a/pom.xml b/pom.xml
index 88d8854ae4..02a8e3b691 100644
--- a/pom.xml
+++ b/pom.xml
@@ -516,7 +516,7 @@
             <dependency>
                 <groupId>org.bouncycastle</groupId>
                 <artifactId>bcmail-jdk15on</artifactId>
-                <version>1.62</version>
+                <version>1.64</version>
             </dependency>
             <!-- upgrade dependency from TIKA -->
             <dependency>