diff --git a/pom.xml b/pom.xml
old mode 100755
new mode 100644
index 7646b48..ead27a3
--- a/pom.xml
+++ b/pom.xml
@@ -39,7 +39,7 @@
         <dependency>
             <groupId>org.bouncycastle</groupId>
             <artifactId>bcprov-jdk15on</artifactId>
-            <version>1.55</version>
+            <version>1.67</version>
         </dependency>
         <dependency>
             <groupId>io.grpc</groupId>