diff --git a/docker/scripts/install-owrx-tools.sh b/docker/scripts/install-owrx-tools.sh
index 58ab9d2..3ae5afc 100755
--- a/docker/scripts/install-owrx-tools.sh
+++ b/docker/scripts/install-owrx-tools.sh
@@ -43,8 +43,8 @@ rm -rf csdr
 git clone https://github.com/jketterl/codecserver.git
 mkdir -p /usr/local/etc/codecserver
 cp codecserver/conf/codecserver.conf /usr/local/etc/codecserver
-#latest develop as of 2021-06-17 (docker image)
-cmakebuild codecserver 7dc6084b2376944df238efba4ed48473750f67d3
+#latest develop as of 2021-07-04 (optional checksum fix)
+cmakebuild codecserver d73c9a56a773355679bc2d4a10f199b62223d7a0
 
 git clone https://github.com/jketterl/digiham.git
 #latest develop as of 2021-06-15 (DMR LCSS overflow fix; D-Star alternate terminator)
diff --git a/owrx/form/input/device.py b/owrx/form/input/device.py
index 0fb1a01..2217b49 100644
--- a/owrx/form/input/device.py
+++ b/owrx/form/input/device.py
@@ -1,4 +1,6 @@
 from owrx.form.input import Input, CheckboxInput, DropdownInput, DropdownEnum, TextInput
+from owrx.form.input.converter import OptionalConverter
+from owrx.form.input.validator import RequiredValidator
 from owrx.soapy import SoapySettings
 
 
@@ -169,7 +171,11 @@ class DirectSamplingInput(DropdownInput):
 class RemoteInput(TextInput):
     def __init__(self):
         super().__init__(
-            "remote", "Remote IP and Port", infotext="Remote hostname or IP and port to connect to. Format = IP:Port"
+            "remote",
+            "Remote IP and Port",
+            infotext="Remote hostname or IP and port to connect to. Format = IP:Port",
+            converter=OptionalConverter(),
+            validator=RequiredValidator(),
         )
 
 
diff --git a/owrx/source/soapy_remote.py b/owrx/source/soapy_remote.py
index b3077e6..efbe5c6 100644
--- a/owrx/source/soapy_remote.py
+++ b/owrx/source/soapy_remote.py
@@ -1,6 +1,7 @@
 from owrx.source.soapy import SoapyConnectorSource, SoapyConnectorDeviceDescription
 from owrx.form.input import Input, TextInput
 from owrx.form.input.device import RemoteInput
+from owrx.form.input.converter import OptionalConverter
 from typing import List
 
 
@@ -28,7 +29,10 @@ class SoapyRemoteDeviceDescription(SoapyConnectorDeviceDescription):
         return super().getInputs() + [
             RemoteInput(),
             TextInput(
-                "remote_driver", "Remote driver", infotext="SoapySDR driver to be used on the remote SoapySDRServer"
+                "remote_driver",
+                "Remote driver",
+                infotext="SoapySDR driver to be used on the remote SoapySDRServer",
+                converter=OptionalConverter(),
             ),
         ]