diff --git a/custom_components/mikrotik_router/.translations/en.json b/custom_components/mikrotik_router/.translations/en.json
index 5aca891..36630e6 100644
--- a/custom_components/mikrotik_router/.translations/en.json
+++ b/custom_components/mikrotik_router/.translations/en.json
@@ -17,9 +17,9 @@
         },
         "error": {
             "name_exists": "Name already exists.",
+            "librouteros_invalid": "Invalid librouteros library version installed.",
             "cannot_connect": "Cannot connect to Mikrotik.",
-            "wrong_login": "Invalid user name or password.",
-            "routeros_api_missing": "Python module routeros_api not installed."
+            "wrong_login": "Invalid user name or password."
         }
     },
     "options": {
@@ -29,7 +29,7 @@
             },
             "device_tracker": {
                 "data": {
-                    "scan_interval": "Scan interval",
+                    "scan_interval": "Scan interval (requires HA restart)",
                     "track_arp": "Show client MAC and IP on interfaces"
                 }
             }
diff --git a/custom_components/mikrotik_router/config_flow.py b/custom_components/mikrotik_router/config_flow.py
index d9ee507..ae91a3f 100644
--- a/custom_components/mikrotik_router/config_flow.py
+++ b/custom_components/mikrotik_router/config_flow.py
@@ -21,6 +21,7 @@ from .const import (
     DEFAULT_SCAN_INTERVAL,
 )
 
+from .exceptions import OldLibrouteros
 from .mikrotikapi import MikrotikAPI
 
 _LOGGER = logging.getLogger(__name__)
@@ -64,14 +65,18 @@ class MikrotikControllerConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
                 errors["base"] = "name_exists"
 
             # Test connection
-            api = MikrotikAPI(host=user_input["host"],
-                              username=user_input["username"],
-                              password=user_input["password"],
-                              port=user_input["port"],
-                              use_ssl=user_input["ssl"]
-                              )
-            if not api.connect():
-                errors[CONF_HOST] = api.error
+            try:
+                api = MikrotikAPI(host=user_input["host"],
+                                  username=user_input["username"],
+                                  password=user_input["password"],
+                                  port=user_input["port"],
+                                  use_ssl=user_input["ssl"]
+                                  )
+            except OldLibrouteros:
+                errors["base"] = "librouteros_invalid"
+            else:
+                if not api.connect():
+                    errors[CONF_HOST] = api.error
 
             # Save instance
             if not errors:
diff --git a/custom_components/mikrotik_router/mikrotikapi.py b/custom_components/mikrotik_router/mikrotikapi.py
index cb0bbe0..d87334b 100644
--- a/custom_components/mikrotik_router/mikrotikapi.py
+++ b/custom_components/mikrotik_router/mikrotikapi.py
@@ -39,11 +39,11 @@ class MikrotikAPI:
     # ---------------------------
     def check_library(self):
         if not hasattr(librouteros.exceptions, 'ConnectionClosed'):
-            error = "Old librouteros installed, check for possible conflicts with other integrations."
+            error = "Invalid librouteros library version installed, possible conflict with other software."
             raise OldLibrouteros(error)
 
         if not hasattr(librouteros.exceptions, 'ProtocolError'):
-            error = "Old librouteros installed, check for possible conflicts with other integrations."
+            error = "Invalid librouteros library version installed, possible conflict with other software."
             raise OldLibrouteros(error)
 
     # ---------------------------
diff --git a/custom_components/mikrotik_router/strings.json b/custom_components/mikrotik_router/strings.json
index 5a74126..36630e6 100644
--- a/custom_components/mikrotik_router/strings.json
+++ b/custom_components/mikrotik_router/strings.json
@@ -17,9 +17,9 @@
         },
         "error": {
             "name_exists": "Name already exists.",
+            "librouteros_invalid": "Invalid librouteros library version installed.",
             "cannot_connect": "Cannot connect to Mikrotik.",
-            "wrong_login": "Invalid user name or password.",
-            "routeros_api_missing": "Python module routeros_api not installed."
+            "wrong_login": "Invalid user name or password."
         }
     },
     "options": {