diff --git a/gradle.properties b/gradle.properties
index 971d11ec15..af45627d91 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -110,8 +110,8 @@ asmVersion=9.8
 batikVersion=1.19
 
 # sync with Tika version (or later)
-bouncycastlePgpVersion=1.79
-bouncycastleVersion=1.79
+bouncycastlePgpVersion=1.81
+bouncycastleVersion=1.81
 
 cglibNodepVersion=2.2.3