diff --git a/library/build.gradle b/library/build.gradle
index c366494..deab4cc 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -12,7 +12,7 @@ java {
 }
 
 ext {
-    bouncycastleVersion = '1.77'
+    bouncycastleVersion = '1.78.1'
     jacksonVersion = '2.15.3'
     okhttpVersion = '4.12.0'