diff --git a/2020/README.md b/2020/README.md
index 04f7713..241d239 100644
--- a/2020/README.md
+++ b/2020/README.md
@@ -11,3 +11,4 @@ https://adventofcode.com/2020/
 | 3 |  `**`  |  `**`   |      |
 | 4 |  `**`  |  `**`   |      |
 | 5 |        |  `**`   |      |
+| 6 |        |  `**`   |      |
diff --git a/2020/day6/day6.hs b/2020/day6/day6.hs
new file mode 100644
index 0000000..3d5993d
--- /dev/null
+++ b/2020/day6/day6.hs
@@ -0,0 +1,9 @@
+import AoC
+
+import qualified Data.Set as S
+import           Data.Set (Set)
+
+main = runAoC ((fmap . fmap) S.fromList . splitOnEmptyLines) part1 part2
+    where part1 = countSetsFolded S.union
+          part2 = countSetsFolded S.intersection
+          countSetsFolded f = sum . map (S.size . foldr1 f)