diff --git a/res/modules/internal/extensions/table.lua b/res/modules/internal/extensions/table.lua
index d2d665755..f47eb643b 100644
--- a/res/modules/internal/extensions/table.lua
+++ b/res/modules/internal/extensions/table.lua
@@ -201,3 +201,11 @@ function table.tostring(t)
     end
     return s..']'
 end
+
+function table.keys(t)
+    local keys = {}
+    for key, _ in pairs(t) do
+        table.insert(keys, key)
+    end
+    return keys
+end