diff --git a/.gitignore b/.gitignore
index 3b6a1589b..98112b04f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,5 @@
 .idea
 .vscode/*
 !.vscode/extensions.json
-!.vscode/settings.json
\ No newline at end of file
+!.vscode/settings.json
+.DS_Store
\ No newline at end of file
diff --git a/server/groups.lua b/server/groups.lua
index dd7c1a3d6..8ca4dced5 100644
--- a/server/groups.lua
+++ b/server/groups.lua
@@ -10,6 +10,18 @@ local jobs = require 'shared.jobs'
 ---@type table<string, Gang>
 local gangs = require 'shared.gangs'
 
+for name in pairs(jobs) do
+    if name ~= name:lower() then
+        lib.print.error(('jobs.lua contains a job name with capital letters: %s'):format(name))
+    end
+end
+
+for name in pairs(gangs) do
+    if name ~= name:lower() then
+        lib.print.error(('gangs.lua contains a gang name with capital letters: %s'):format(name))
+    end
+end
+
 ---Adds or overwrites jobs in shared/jobs.lua
 ---@param newJobs table<string, Job>
 function CreateJobs(newJobs)
diff --git a/shared/gangs.lua b/shared/gangs.lua
index 2f3d1b70b..c4f59f44a 100644
--- a/shared/gangs.lua
+++ b/shared/gangs.lua
@@ -1,3 +1,4 @@
+---Gang names must be lower case (top level table key)
 ---@type table<string, Gang>
 return {
 	['none'] = {
diff --git a/shared/jobs.lua b/shared/jobs.lua
index 2a5ee846d..2d19f0051 100644
--- a/shared/jobs.lua
+++ b/shared/jobs.lua
@@ -1,3 +1,4 @@
+---Job names must be lower case (top level table key)
 ---@type table<string, Job>
 return {
 	['unemployed'] = {