diff --git a/homeassistant/package_constraints.txt b/homeassistant/package_constraints.txt
index f30433d0a79cb..5ca227ef38936 100644
--- a/homeassistant/package_constraints.txt
+++ b/homeassistant/package_constraints.txt
@@ -30,7 +30,7 @@ janus==1.0.0
 Jinja2==3.1.2
 lru-dict==1.1.8
 mutagen==1.46.0
-orjson==3.8.12
+orjson==3.9.1
 paho-mqtt==1.6.1
 Pillow==9.5.0
 pip>=21.0,<23.2
diff --git a/pyproject.toml b/pyproject.toml
index 60c534b8bf2cb..10932bbd50b3c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ dependencies    = [
     "cryptography==40.0.2",
     # pyOpenSSL 23.1.0 is required to work with cryptography 39+
     "pyOpenSSL==23.1.0",
-    "orjson==3.8.12",
+    "orjson==3.9.1",
     "pip>=21.0,<23.2",
     "python-slugify==4.0.1",
     "PyYAML==6.0",
diff --git a/requirements.txt b/requirements.txt
index ee8b2d7821a07..a51216b899f26 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ lru-dict==1.1.8
 PyJWT==2.7.0
 cryptography==40.0.2
 pyOpenSSL==23.1.0
-orjson==3.8.12
+orjson==3.9.1
 pip>=21.0,<23.2
 python-slugify==4.0.1
 PyYAML==6.0