diff --git a/tx-signer/pom.xml b/tx-signer/pom.xml
index 027a22d..c01afe2 100644
--- a/tx-signer/pom.xml
+++ b/tx-signer/pom.xml
@@ -29,7 +29,7 @@
         <dependency>
             <groupId>org.bouncycastle</groupId>
             <artifactId>bcprov-ext-jdk15on</artifactId>
-            <version>1.55</version>
+            <version>1.67</version>
         </dependency>
 
         <dependency>