diff --git a/src/database/world_graph.lua b/src/database/world_graph.lua
index 871e265..1de2443 100644
--- a/src/database/world_graph.lua
+++ b/src/database/world_graph.lua
@@ -750,11 +750,11 @@ function worldGraph:serialize()
 
   for k,r in ipairs(_.sort(array,sort)) do
     if next(r.locations) then
-      lines:insert("")
-      lines:insert("Region: " .. r.name)
+      table.insert(lines, "")
+      table.insert(lines, "Region: " .. r.name)
       for k2,l in pairs(r.locations) do
         if l.item ~= nil and not _has({l.item}, "event") then
-          lines:insert("\t " .. l.name .. ": " .. l.item.name)
+          table.insert(lines, "\t " .. l.name .. ": " .. l.item.name)
         end
       end
     end
@@ -764,7 +764,7 @@ function worldGraph:serialize()
 end
 
 function worldGraph:logLocations()
-  for k,v in ipairs(worldGraph:serialize()) do
+  for k,v in ipairs(self:serialize()) do
     logSpoiler(v)
   end
 end
diff --git a/src/randomizer.lua b/src/randomizer.lua
index a1f987e..4deddce 100644
--- a/src/randomizer.lua
+++ b/src/randomizer.lua
@@ -354,14 +354,14 @@ function C:_copyMyChar()
 end
 
 function C:_generateHash()
-  local serialized = self.worldGraph:serialize():concat()
+  local serialized = table.concat(self.worldGraph:serialize())
   local hashed = ld.encode('string', 'hex', ld.hash('sha256', serialized))
   hashed = tonumber(hashed:sub(-8,  -1), 16)
   hashed = hashed % (39^5)
   
   local h = {}
   for i=1,5 do
-    h:insert((hashed%39)+1)
+    table.insert(h, (hashed%39)+1)
     hashed = math.floor(hashed / 39)
   end