diff --git a/README.md b/README.md
index 577aaa6..8715d71 100644
--- a/README.md
+++ b/README.md
@@ -1,27 +1,39 @@
 Better-Whitelist provides a basic whitelist system for your server that you can adapt to your use case.
+
 The mod is required both on the server and any clients connecting to the server.
+
 The whitelist is configured using [μScript](https://git.frohnmeyer-wds.de/Johannes/java-commons/src/branch/master/muscript), but you don't have to be good at programming to use this mod.
+
 A config file with some additional details will be created when you first start your server with the mod.
+
 A simple config for Better-Whitelist could look as follows (please note that you'd probably have to add exceptions for client-side mods with optional server-side components when using this):
 ```
-sharedMods = mods::values()::filter({ v -> v.environment != 'server' })::map({ v -> { id = v.id, version = v.version } })
+// convert a mod to a simpler representation to save bandwidth
+simplify = { mod -> { id = mod.id, version = mod.version } }
+
+// all non-serverside mods present on the server
+sharedMods = mods::values()
+  ::filter({ v -> v.environment != 'server' & v.id != 'java' })
+  ::map(simplify)
 
 // ensure the client has the correct version of every non-serverside mod on the server
-assert(challenge({ arg ->
-  arg::allMatch({ v -> mods::values()::anyMatch({ m -> v.id == m.id & v.version == m.version }) })
-}, sharedMods))
+clientMissing = challenge({ arg ->
+  arg::filter({ v -> !mods::values()::anyMatch({ m -> v.id == m.id & v.version == m.version }) })
+}, sharedMods)
+assert(clientMissing::isEmpty(), 'You lack required mods: ' || clientMissing)
 
 // ensure the client has no additional mods that would be required on the server
-assert(challenge({ arg ->
-  clientSideMods = mods::values()::filter({ v -> v.environment != 'client' })
-  clientSideMods::allMatch({ v -> arg::anyMatch({ m -> v.id == m.id & v.version == m.version }) })
-}, sharedMods))
+clientAdditional = challenge({ arg, fn ->
+  clientSideMods = mods::values()::filter({ v -> v.environment != 'client' & v.id != 'java' })
+  clientSideMods::filter({ v -> !arg::anyMatch({ m -> v.id == m.id & v.version == m.version }) })::map(fn)
+}, sharedMods, simplify)
+assert(clientAdditional::isEmpty(), 'You have unsupported mods: ' || clientAdditional)
 
 // filter resource packs for X-Ray packs
 bannedWords = listOf('xray', 'x-ray', 'cheat')
 assert(!challenge({ ->
   resourcePacks::map({ pack -> pack.name || ' ' || pack.displayName || ' ' || pack.description })
-})::anyMatch({ v -> bannedWords::anyMatch({ word -> v::contains(word) }) }))
+})::anyMatch({ v -> bannedWords::anyMatch({ word -> v::toLower()::contains(word) }) }), "Please don't cheat, " || user.name)
 ```
 
 The following things are available to your scripts:
diff --git a/src/main/java/io/gitlab/jfronny/betterwhitelist/server/BetterWhitelistServer.java b/src/main/java/io/gitlab/jfronny/betterwhitelist/server/BetterWhitelistServer.java
index 40271a2..0d84f46 100644
--- a/src/main/java/io/gitlab/jfronny/betterwhitelist/server/BetterWhitelistServer.java
+++ b/src/main/java/io/gitlab/jfronny/betterwhitelist/server/BetterWhitelistServer.java
@@ -82,7 +82,7 @@ public class BetterWhitelistServer implements DedicatedServerModInitializer {
                 if (!challenge.responses.isEmpty()) return challenge.responses.remove();
                 else throw new AssertFail("Took too long to respond");
             }).set("user", Map.of(
-                    "id", DFinal.of(gp.getId().toString()),
+                    "id", gp.getId() == null ? new DNull() : DFinal.of(gp.getId().toString()),
                     "name", DFinal.of(gp.getName())
             ));