diff --git a/blockchain-part2/pom.xml b/blockchain-part2/pom.xml
index 8655f94..1ac04cf 100644
--- a/blockchain-part2/pom.xml
+++ b/blockchain-part2/pom.xml
@@ -22,7 +22,7 @@
         <dependency>
             <groupId>org.bouncycastle</groupId>
             <artifactId>bcprov-jdk15on</artifactId>
-            <version>1.59</version>
+            <version>1.67</version>
         </dependency>
     </dependencies>
 </project>
\ No newline at end of file