diff --git a/librefi/connectors/networkmanager.py b/librefi/connectors/networkmanager.py
index 1181254..f5cf917 100644
--- a/librefi/connectors/networkmanager.py
+++ b/librefi/connectors/networkmanager.py
@@ -13,7 +13,7 @@ class NetworkManagerConnector:
         try:
             subp = subprocess.check_output(self.NMCLI_BASE + args).decode("utf-8")
         except subprocess.CalledProcessError as err:
-            subp = err.output
+            subp = err.output.decode("utf-8")
 
         if parse:
             # if no output