diff --git a/build.gradle b/build.gradle
index ee3569f..16b602c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -30,7 +30,7 @@ repositories {
 dependencies {
     // The production code uses the SLF4J logging API at compile time
     compile 'org.slf4j:slf4j-api:1.7.21'
-    compile 'org.bouncycastle:bcprov-jdk15on:1.58'
+    compile 'org.bouncycastle:bcprov-jdk15on:1.63'
     compile 'commons-io:commons-io:2.5'
     compile 'commons-cli:commons-cli:1.3.1'