diff --git a/src/FileLogger.cpp b/src/FileLogger.cpp
index 79b1a5d..a851d91 100644
--- a/src/FileLogger.cpp
+++ b/src/FileLogger.cpp
@@ -4,6 +4,7 @@
 
 #include <fstream>
 #include <iostream>
+#include <climits>
 
 #include "FileLogger.h"
 
@@ -24,5 +25,9 @@ std::string FileLogger::readip() {
 
     in >> ip;
 
-    return ip;
+    // when received ip has no : return 0.0.0.0
+    if (ip.find(':') == ULONG_MAX)
+        return "0.0.0.0";
+    else
+        return ip;
 }
diff --git a/src/IPRefresher.cpp b/src/IPRefresher.cpp
index 724129c..14d5335 100644
--- a/src/IPRefresher.cpp
+++ b/src/IPRefresher.cpp
@@ -16,6 +16,7 @@
 #include <IPRefresher.h>
 #include <Config.h>
 #include <Version.h>
+#include <climits>
 
 void IPRefresher::checkIPAdress(bool force) {
     FileLogger logger;
@@ -26,6 +27,9 @@ void IPRefresher::checkIPAdress(bool force) {
     if (ip.empty()) {
         //no internet connection (or other error)
         Logger::warning("no internet connection");
+    } else if (ip.find(':') == ULONG_MAX) {
+        // error when ip doesn't contain a :
+        Logger::warning("an error occured when getting the global ip");
     } else {
         std::string oldip = logger.readip();
 
diff --git a/src/api/TelegramAPI.cpp b/src/api/TelegramAPI.cpp
index 3df25ea..0c26a34 100644
--- a/src/api/TelegramAPI.cpp
+++ b/src/api/TelegramAPI.cpp
@@ -3,8 +3,9 @@
 //
 
 #include "api/TelegramAPI.h"
+#include "Logger.h"
 
-#include <Logger.h>
+#include <climits>
 
 int TelegramAPI::sendMessage(const std::string& text) {
     Hashmap<std::string, std::string> args;
@@ -15,7 +16,6 @@ int TelegramAPI::sendMessage(const std::string& text) {
 
     std::string reply = request("https://api.telegram.org/bot" + apikey + "/sendmessage", false, args, headers);
 
-    unsigned const long ULONG_MAX = -1;
     if (reply.find("\"error_code\"") != ULONG_MAX) {
         Logger::error("failed to refresh the ip (Dynu API)");
         return -1;