diff --git a/homeassistant/components/denon_rs232/manifest.json b/homeassistant/components/denon_rs232/manifest.json
index c4dbaf2c82a9..35fe2d45754e 100644
--- a/homeassistant/components/denon_rs232/manifest.json
+++ b/homeassistant/components/denon_rs232/manifest.json
@@ -9,5 +9,5 @@
   "iot_class": "local_push",
   "loggers": ["denon_rs232"],
   "quality_scale": "bronze",
-  "requirements": ["denon-rs232==4.2.2"]
+  "requirements": ["denon-rs232==4.2.3"]
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index 8c56571555d7..1164c752a3e0 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -848,7 +848,7 @@ deluge-client==1.10.2
 demetriek==1.4.1
 
 # homeassistant.components.denon_rs232
-denon-rs232==4.2.2
+denon-rs232==4.2.3
 
 # homeassistant.components.denonavr
 denonavr==1.3.3