diff --git a/homeassistant/components/modbus/manifest.json b/homeassistant/components/modbus/manifest.json
index 48a3552e95a3..75e8ca0a8f27 100644
--- a/homeassistant/components/modbus/manifest.json
+++ b/homeassistant/components/modbus/manifest.json
@@ -5,5 +5,9 @@
   "documentation": "https://www.home-assistant.io/integrations/modbus",
   "iot_class": "local_polling",
   "loggers": ["pymodbus"],
-  "requirements": ["pymodbus==3.13.1", "modbus-connection[tmodbus]==4.8.1"]
+  "requirements": [
+    "pymodbus==3.13.1",
+    "modbus-connection[tmodbus]==4.9.0",
+    "tmodbus==0.5.2"
+  ]
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index 789adc1b2992..3d7ce40ae570 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1610,7 +1610,7 @@ mitsubishi-comfort==0.5.2
 moat-ble==0.1.1
 
 # homeassistant.components.modbus
-modbus-connection[tmodbus]==4.8.1
+modbus-connection[tmodbus]==4.9.0
 
 # homeassistant.components.moehlenhoff_alpha2
 moehlenhoff-alpha2==1.4.0
@@ -3219,6 +3219,9 @@ tilt-pi==0.2.1
 # homeassistant.components.tmb
 tmb==0.0.4
 
+# homeassistant.components.modbus
+tmodbus==0.5.2
+
 # homeassistant.components.todoist
 todoist-api-python==3.1.0