Prison

[16:55:56] [Server thread/INFO]: [Prison] Enabling Prison v2.0.5.2
[16:55:57] [Server thread/ERROR]: Error occurred while enabling Prison v2.0.5.2 (Is it up to date?)
java.lang.NoSuchMethodError: org.bukkit.Bukkit.getOnlinePlayers()Ljava/util/Collection;
	at me.sirfaizdat.prison.core.PlayerList.<init>(PlayerList.java:24) ~[?:?]
	at me.sirfaizdat.prison.core.Prison.onEnable(Prison.java:63) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:316) ~[spigot.jar:git-Spigot-1493]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:324) [spigot.jar:git-Spigot-1493]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot.jar:git-Spigot-1493]
	at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugin(CraftServer.java:465) [spigot.jar:git-Spigot-1493]
	at org.bukkit.craftbukkit.v1_7_R3.CraftServer.enablePlugins(CraftServer.java:383) [spigot.jar:git-Spigot-1493]
	at net.minecraft.server.v1_7_R3.MinecraftServer.n(MinecraftServer.java:359) [spigot.jar:git-Spigot-1493]
	at net.minecraft.server.v1_7_R3.MinecraftServer.g(MinecraftServer.java:333) [spigot.jar:git-Spigot-1493]
	at net.minecraft.server.v1_7_R3.MinecraftServer.a(MinecraftServer.java:289) [spigot.jar:git-Spigot-1493]
	at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.java:193) [spigot.jar:git-Spigot-1493]
	at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:457) [spigot.jar:git-Spigot-1493]