diff --git a/minecraftLauncher.py b/minecraftLauncher.py
index 8e82b3d..2528066 100644
--- a/minecraftLauncher.py
+++ b/minecraftLauncher.py
@@ -61,10 +61,13 @@ def main():
 	print("Extracting natives...")
 	clientJson = readJsonFile(p(versionPath,version + ".json"))
 	libraryList = ""
+	separator = ";"
+	if osName != "windows": separator = ":"
+	
 	for library in clientJson["libraries"]:
 		if "artifact" in library["downloads"]:
 			library["downloads"]["artifact"]["path"] = library["downloads"]["artifact"]["path"].replace("/",os.path.sep)
-			libraryList += p(libraryPath,library["downloads"]["artifact"]["path"]) + ";"
+			libraryList += p(libraryPath,library["downloads"]["artifact"]["path"]) + separator
 		if "classifiers" in library["downloads"]:
 			if "natives-" +osName in library["downloads"]["classifiers"]:
 				native = library["downloads"]["classifiers"]["natives-" +osName]