diff --git a/spring-boot-blockchain/pom.xml b/spring-boot-blockchain/pom.xml
index 3b81af2..97d9292 100644
--- a/spring-boot-blockchain/pom.xml
+++ b/spring-boot-blockchain/pom.xml
@@ -20,7 +20,7 @@
         <dependency>
             <groupId>org.bouncycastle</groupId>
             <artifactId>bcprov-jdk15on</artifactId>
-            <version>1.59</version>
+            <version>1.67</version>
         </dependency>
     </dependencies>