diff --git a/attachments/kong/plugins/open-appsec-waf-kong-plugin/handler.lua b/attachments/kong/plugins/open-appsec-waf-kong-plugin/handler.lua
index 2dda329..1a0dcab 100755
--- a/attachments/kong/plugins/open-appsec-waf-kong-plugin/handler.lua
+++ b/attachments/kong/plugins/open-appsec-waf-kong-plugin/handler.lua
@@ -238,6 +238,9 @@ function NanoHandler.body_filter(conf)
     local session_data = ctx.session_data
 
     if not session_id or not session_data or ctx.session_finalized then
+        -- Clear the chunk to release it from memory immediately
+        -- Without this, Kong holds chunks in memory causing OOM
+        ngx.arg[1] = nil
         return
     end