diff --git a/splunk_eventgen/lib/requirements.txt b/splunk_eventgen/lib/requirements.txt
index d9cd22f7..ba8d9458 100644
--- a/splunk_eventgen/lib/requirements.txt
+++ b/splunk_eventgen/lib/requirements.txt
@@ -1,4 +1,4 @@
-ujson==2.0.3
+ujson==5.4.0
 jinja2==2.10.3
 requests-futures==1.0.0
 urllib3==1.24.2