diff --git a/requirements.txt b/requirements.txt
index 3a0d650..f3abee6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -89,7 +89,7 @@ odfpy==1.4.1
     # via flattentool
 openpyxl==3.0.7
     # via flattentool
-orjson==3.9.5
+orjson==3.9.15
     # via libcoveoc4ids
 persistent==4.7.0
     # via
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 9287d9e..9254d7a 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -170,7 +170,7 @@ openpyxl==3.0.7
     # via
     #   -r requirements.txt
     #   flattentool
-orjson==3.9.5
+orjson==3.9.15
     # via
     #   -r requirements.txt
     #   libcoveoc4ids