diff --git a/requirements.txt b/requirements.txt
index c2b4738..7185b4a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 mmcif==0.81
 numpy==1.26.1
-orjson==3.9.7
+orjson==3.9.9
 rnapolis==0.1.4