diff --git a/src/main/kotlin/commands/dev/DevCommand.kt b/src/main/kotlin/commands/dev/DevCommand.kt
index 6efa59b..121192d 100644
--- a/src/main/kotlin/commands/dev/DevCommand.kt
+++ b/src/main/kotlin/commands/dev/DevCommand.kt
@@ -103,7 +103,7 @@ class DevCommand : CliktCommand("dev") {
             runServer(
                 args, jvmArgs, listOf(
                     jarFile,
-                    if (forceUpgrade) "-forceUpgrade" else "",
+                    *(if (forceUpgrade) arrayOf("-forceUpgrade") else arrayOf()),
                     "--port", port.toString(),
                     "--level-name", worldFile.name,
                     "--world-dir", workingDir.absolutePath,
@@ -174,7 +174,7 @@ class DevCommand : CliktCommand("dev") {
             *args.toTypedArray(),
             *OPENJ9_ARGS,
             *(if (isJava8(server)) arrayOf() else JAVA17_ARGS),
-            if (profile) "-javaagent:/jars/LixfelsProfiler.jar=start" else "",
+            *(if (profile) arrayOf("-javaagent:/jars/LixfelsProfiler.jar=start") else arrayOf()),
             "-Xshareclasses:nonfatal,name=$server",
             "-jar",
             *cmd.toTypedArray()