diff --git a/src/haxeLanguageServer/server/HaxeServer.hx b/src/haxeLanguageServer/server/HaxeServer.hx
index e53eb889..7370f33f 100644
--- a/src/haxeLanguageServer/server/HaxeServer.hx
+++ b/src/haxeLanguageServer/server/HaxeServer.hx
@@ -220,7 +220,11 @@ class HaxeServer {
 		startProgress("Building Cache");
 
 		// see vshaxe/haxe-language-server#44 for explanation
-		final leadingArgs = ["--no-output", "--each", "--no-output", "-D", "message.no-color"];
+		final leadingArgs = ["--no-output", "--each", "--no-output"];
+		if (haxeVersion.major < 5) {
+			leadingArgs.push("-D");
+			leadingArgs.push("message.no-color");
+		}
 
 		process("cache build", leadingArgs.concat(context.config.displayArguments), null, true, null, Processed(function(_) {
 			stopProgress();