diff --git a/requirements-dev.txt b/requirements-dev.txt
index c204079..2255833 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -81,7 +81,7 @@ odfpy==1.4.1
     # via pandas
 openpyxl==3.1.2
     # via pandas
-orjson==3.9.7
+orjson==3.9.9
     # via datahub (pyproject.toml)
 packaging==23.2
     # via
diff --git a/requirements.txt b/requirements.txt
index 8f4ef3a..1531fe3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ odfpy==1.4.1
     # via pandas
 openpyxl==3.1.2
     # via pandas
-orjson==3.9.7
+orjson==3.9.9
     # via datahub (pyproject.toml)
 pandas[excel]==2.1.1
     # via datahub (pyproject.toml)