diff --git a/src/lib/aoc.lua b/src/lib/aoc.lua
index 73d8028..1290434 100644
--- a/src/lib/aoc.lua
+++ b/src/lib/aoc.lua
@@ -100,7 +100,7 @@ local function printBanner()
 end
 
 local function main()
-    local stats = loadStats("aoc/res/stats.json")
+    local stats = loadStats("aoc/res/stats.json") or {}
     local selectedDay = math.max(1, math.min(END_DATE.day, today.day))
     if not dates.isInDateRange(START_DATE, today, END_DATE) then
         selectedDay = 1
@@ -128,7 +128,7 @@ local function main()
                 dayStats.puzzle2
             )
             day:show()
-            stats = loadStats("aoc/res/stats.json")
+            stats = loadStats("aoc/res/stats.json") or {}
         end
     end
 end
diff --git a/src/lib/days.lua b/src/lib/days.lua
index f102b19..21410fe 100644
--- a/src/lib/days.lua
+++ b/src/lib/days.lua
@@ -128,7 +128,9 @@ function Day:getInputData()
 end
 
 function Day:execPuzzle(puzzleI, data)
-    local puzzle = require(self:srcDir() .. "/puzzle" .. puzzleI)
+    local path = self:srcDir() .. "/puzzle" .. puzzleI
+    package.loaded[path] = nil
+    local puzzle = require(path)
     local t0 = os.epoch("local")
     local result = puzzle.solve(data)
     local t1 = os.epoch("local")
diff --git a/src/lib/utils.lua b/src/lib/utils.lua
index d990232..65bff2b 100644
--- a/src/lib/utils.lua
+++ b/src/lib/utils.lua
@@ -70,4 +70,12 @@ function utils.waitForKey(targetKey)
     end
 end
 
+function utils.splitLines(data)
+    local t = {}
+    for str in string.gmatch(data, "([^\n]+)") do
+        table.insert(t, str)
+    end
+    return t
+end
+
 return utils