[20:09:58 ERROR]: Could not load 'plugins\Empirecraft.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError
: com/n1t3slay3r/empirecraft/Main : Unsupported major.minor version 52.0
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:131) ~[Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.
java:328) ~[Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:251) [Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugins(CraftServer.ja
va:357) [Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.<init>(CraftServer.java:31
9) [Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at net.minecraft.server.v1_7_R3.PlayerList.<init>(PlayerList.java:68) [S
pigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at net.minecraft.server.v1_7_R3.DedicatedPlayerList.<init>(SourceFile:14
) [Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.jav
a:126) [Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java
:436) [Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:6
28) [Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
Caused by: java.lang.UnsupportedClassVersionError: com/n1t3slay3r/empirecraft/Ma
in : Unsupported major.minor version 52.0
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_51]
        at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_51]
        at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0
_51]
        at java.net.URLClassLoader.defineClass(Unknown Source) ~[?:1.7.0_51]
        at java.net.URLClassLoader.access$100(Unknown Source) ~[?:1.7.0_51]
        at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.7.0_51]
        at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.7.0_51]
        at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_
51]
        at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.7.0_51]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.
java:77) ~[Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.
java:62) ~[Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]
        at java.lang.Class.forName0(Native Method) ~[?:1.7.0_51]
        at java.lang.Class.forName(Unknown Source) ~[?:1.7.0_51]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.jav
a:40) ~[Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:127) ~[Spigot.jar:git-Bukkit-1.7.2-R0.3-35-gd6ac518-b3061jnks]
        ... 9 more