diff --git a/gitbook06/pom.xml b/gitbook06/pom.xml
index 9337c67..1f502cd 100644
--- a/gitbook06/pom.xml
+++ b/gitbook06/pom.xml
@@ -112,7 +112,7 @@
 		<dependency>
 			<groupId>org.bouncycastle</groupId>
 			<artifactId>bcprov-jdk15on</artifactId>
-			<version>1.60</version>
+			<version>1.67</version>
 		</dependency>
 
 		<!-- spring-boot-starter-websocket -->