diff --git a/build.gradle b/build.gradle
index 67323e0..3bb5446 100644
--- a/build.gradle
+++ b/build.gradle
@@ -130,7 +130,7 @@ dependencies {
     api 'com.auth0:java-jwt:3.19.4'
     api 'com.auth0:jwks-rsa:0.23.0'
 
-    testImplementation 'org.bouncycastle:bcprov-jdk15on:1.64'
+    testImplementation 'org.bouncycastle:bcprov-jdk15on:1.70'
     testImplementation 'org.hamcrest:java-hamcrest:2.0.0.0'
     testImplementation 'org.hamcrest:hamcrest-core:1.3'
     testImplementation 'org.mockito:mockito-core:2.8.9'