diff --git a/build.gradle b/build.gradle
index dfdd5b3..08a3acb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,7 +7,7 @@
 }
 
 dependencies {
-	compile group: 'org.bouncycastle', name: 'bcprov-jdk15on', version: '1.60'
+	compile group: 'org.bouncycastle', name: 'bcprov-jdk15on', version: '1.66'
 
 	testImplementation group: 'junit', name: 'junit', version: '4.12'
 	testImplementation group: 'org.hamcrest', name: 'hamcrest-library', version: '1.3'