diff --git a/2015/day05/day05.hs b/2015/day05/day05.hs
new file mode 100644
index 0000000..4a40391
--- /dev/null
+++ b/2015/day05/day05.hs
@@ -0,0 +1,18 @@
+import Aoc
+import Text.Regex.PCRE
+
+part1 :: [String] -> Int
+part1 = length . filter (\str -> hasVowels str && hasDouble str && not (hasForbidden str))
+    where
+        hasVowels = (=~ "([aeiou].*){3}")
+        hasDouble = (=~ "(\\w)\\1")
+        hasForbidden = (=~ "(ab|cd|pq|xy)")
+
+part2 :: [String] -> Int
+part2 = length . filter (\str -> hasPair str && hasBetween str)
+    where
+        hasPair = (=~ "(\\w\\w).*\\1")
+        hasBetween = (=~ "(\\w).\\1")
+
+main :: IO ()
+main = aocMain id part1 part2
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