Mon erreur

[11:22:39 ERROR]: Could not load 'plugins/EvisionMC_HUB.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: net/evisionmc/hub/Main : Unsupported major.minor version 52.0
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:291) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.reload(CraftServer.java:738) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.Bukkit.reload(Bukkit.java:534) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:640) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:626) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:411) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:375) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556) [Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at java.lang.Thread.run(Thread.java:748) [?:1.7.0_201]
Caused by: java.lang.UnsupportedClassVersionError: net/evisionmc/hub/Main : Unsupported major.minor version 52.0
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_201]
        at java.lang.ClassLoader.defineClass(ClassLoader.java:808) ~[?:1.7.0_201]
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.7.0_201]
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:443) ~[?:1.7.0_201]
        at java.net.URLClassLoader.access$100(URLClassLoader.java:65) ~[?:1.7.0_201]
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[?:1.7.0_201]
        at java.net.URLClassLoader$1.run(URLClassLoader.java:349) ~[?:1.7.0_201]
        at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_201]
        at java.net.URLClassLoader.findClass(URLClassLoader.java:348) ~[?:1.7.0_201]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:430) ~[?:1.7.0_201]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:363) ~[?:1.7.0_201]
        at java.lang.Class.forName0(Native Method) ~[?:1.7.0_201]
        at java.lang.Class.forName(Class.java:278) ~[?:1.7.0_201]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[Spigot.1.8.jar:git-Spigot-f94fe8f-d27e6d0]
        ... 14 more