diff --git a/requirements.txt b/requirements.txt
index 737db44c..94b98b7e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,6 @@ Cython==0.29.28
 cyvcf2==0.30.15
 uvloop==0.16.0
 aiocache==0.11.1
-ujson==5.1.0
+ujson==5.2.0
 Authlib==0.15.5
 gunicorn==20.1.0
diff --git a/setup.py b/setup.py
index 34337446..2c9d3021 100644
--- a/setup.py
+++ b/setup.py
@@ -46,7 +46,7 @@
         "uvloop==0.16.0",
         "cyvcf2==0.30.15",
         "aiocache==0.11.1",
-        "ujson==5.1.0",
+        "ujson==5.2.0",
     ],
     extras_require={
         "vcf": [