diff --git a/parameterManager.cpp b/parameterManager.cpp
index 7ec87de..05aaab7 100644
--- a/parameterManager.cpp
+++ b/parameterManager.cpp
@@ -183,7 +183,7 @@ int loadDefaulOptions(Settings &settings)
 
         } else if (what == "default-maxThreads") {
             settings.maxThreads = static_cast<unsigned>(atoi(data.c_str()));
-            if(isNumber(data) ) {
+            if(!isNumber(data) ) {
                 std::cout << " => Error_Defaults: Thread-Max Ungültige Zahl: " << data << std::endl;
                 return 18;
             } else if (settings.maxThreads > 10) {
diff --git a/parameterManager.h b/parameterManager.h
index 62e4fa3..20336ad 100644
--- a/parameterManager.h
+++ b/parameterManager.h
@@ -38,7 +38,7 @@ struct Settings {
         proxy_ip = "127.0.0.1",
         languages = "GerDub,GerSub,Eng",
         genaueHoster = "",
-        version = "2.5.2",
+        version = "2.5.3",
         defaultFileVersion="1.3",
         outputFilePath = "",
         default_checkPath = "",