diff --git a/homeassistant/components/duco/manifest.json b/homeassistant/components/duco/manifest.json
index aa7749962888..a047e3f87a71 100644
--- a/homeassistant/components/duco/manifest.json
+++ b/homeassistant/components/duco/manifest.json
@@ -13,7 +13,7 @@
   "iot_class": "local_polling",
   "loggers": ["duco"],
   "quality_scale": "platinum",
-  "requirements": ["python-duco-client==0.3.10"],
+  "requirements": ["python-duco-client==0.4.0"],
   "zeroconf": [
     {
       "name": "duco [[][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][]].*",
diff --git a/requirements_all.txt b/requirements_all.txt
index 7b0625d74619..26891a978f86 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -2587,7 +2587,7 @@ python-digitalocean==1.13.2
 python-dropbox-api==0.1.3
 
 # homeassistant.components.duco
-python-duco-client==0.3.10
+python-duco-client==0.4.0
 
 # homeassistant.components.ecobee
 python-ecobee-api==0.3.2
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 45f6ddcd308d..9679eaa6d86d 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -2213,7 +2213,7 @@ python-citybikes==0.3.3
 python-dropbox-api==0.1.3
 
 # homeassistant.components.duco
-python-duco-client==0.3.10
+python-duco-client==0.4.0
 
 # homeassistant.components.ecobee
 python-ecobee-api==0.3.2
diff --git a/tests/components/duco/snapshots/test_diagnostics.ambr b/tests/components/duco/snapshots/test_diagnostics.ambr
index 029af1a1798c..76b108b65e3b 100644
--- a/tests/components/duco/snapshots/test_diagnostics.ambr
+++ b/tests/components/duco/snapshots/test_diagnostics.ambr
@@ -4,10 +4,12 @@
     'board_info': dict({
       'box_name': 'SILENT_CONNECT',
       'box_sub_type_name': 'Eu',
+      'public_api_version': None,
       'serial_board_box': '**REDACTED**',
       'serial_board_comm': '**REDACTED**',
       'serial_duco_box': '**REDACTED**',
       'serial_duco_comm': '**REDACTED**',
+      'software_version': None,
     }),
     'duco_diagnostics': list([
       dict({