diff --git a/homeassistant/components/iron_os/manifest.json b/homeassistant/components/iron_os/manifest.json
index 1d7827fb2f6..580c3dfa271 100644
--- a/homeassistant/components/iron_os/manifest.json
+++ b/homeassistant/components/iron_os/manifest.json
@@ -15,5 +15,5 @@
   "iot_class": "local_polling",
   "loggers": ["pynecil"],
   "quality_scale": "platinum",
-  "requirements": ["pynecil==4.2.0"]
+  "requirements": ["pynecil==4.2.1"]
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index 9707c80dbda..57fc7aba8ca 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -2191,7 +2191,7 @@ pymsteams==0.1.12
 pymysensors==0.26.0
 
 # homeassistant.components.iron_os
-pynecil==4.2.0
+pynecil==4.2.1
 
 # homeassistant.components.netgear
 pynetgear==0.10.10
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index c0e57df2886..c64701e218f 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -1826,7 +1826,7 @@ pymonoprice==0.5
 pymysensors==0.26.0
 
 # homeassistant.components.iron_os
-pynecil==4.2.0
+pynecil==4.2.1
 
 # homeassistant.components.netgear
 pynetgear==0.10.10