diff --git a/day05/part1.py b/day05/part1.py
index 54d07f3..3d17619 100644
--- a/day05/part1.py
+++ b/day05/part1.py
@@ -1,19 +1,16 @@
 #!/usr/bin/env python3
 import re
-from collections import defaultdict
 
 lines = (x.strip() for x in open("input.txt"))
-points = defaultdict(int)
+points = {}
 
 for line in lines:
     [x1, y1, x2, y2] = list(map(int, re.match(r"(\d+),(\d+) -> (\d+),(\d+)", line).groups()))
     if x1 == x2:
         for y in range(min(y1, y2), max(y1, y2)+1):
-            key = '{},{}'.format(x1, y)
-            points[key] = points[key] + 1
+            points[(x1, y)] = points.get((x1, y), 0) + 1
     elif y1 == y2:
         for x in range(min(x1, x2), max(x1, x2)+1):
-            key = '{},{}'.format(x, y1)
-            points[key] = points[key] + 1
+            points[(x, y1)] = points.get((x, y1), 0) + 1
 
 print(sum(1 if val >= 2 else 0 for val in points.values()))
diff --git a/day05/part2.py b/day05/part2.py
index a0135e8..3d37633 100644
--- a/day05/part2.py
+++ b/day05/part2.py
@@ -1,10 +1,9 @@
 #!/usr/bin/env python3
 import re
-from collections import defaultdict
 from itertools import repeat
 
 lines = (x.strip() for x in open("input.txt"))
-points = defaultdict(int)
+points = {}
 
 for line in lines:
     [x1, y1, x2, y2] = list(map(int, re.match(r"(\d+),(\d+) -> (\d+),(\d+)", line).groups()))
@@ -12,7 +11,6 @@ for line in lines:
             range(x1, x2+(x1 <= x2)*2-1, (x1 <= x2)*2-1) if x1 != x2 else repeat(x1),
             range(y1, y2+(y1 <= y2)*2-1, (y1 <= y2)*2-1) if y1 != y2 else repeat(y1)
     ):
-        key = '{},{}'.format(x, y)
-        points[key] = points[key] + 1
+        points[(x, y)] = points.get((x, y), 0) + 1
 
 print(sum(val >= 2 for val in points.values()))