diff --git a/build.gradle b/build.gradle
index ffddb62294..55e5cfffdb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -63,7 +63,7 @@ buildscript {
     ext.asm_version = '7.1'
     ext.artemis_version = '2.19.1'
     // TODO Upgrade Jackson only when corda is using kotlin 1.3.10
-    ext.jackson_version = '2.17.2'
+    ext.jackson_version = '2.13.5'
     ext.jackson_kotlin_version = '2.9.7'
     ext.jetty_version = '9.4.56.v20240826'
     ext.jersey_version = '2.25'