diff --git a/day04/solution01.rb b/day04/solution01.rb
new file mode 100755
index 0000000..ea7a646
--- /dev/null
+++ b/day04/solution01.rb
@@ -0,0 +1,55 @@
+#!/bin/env ruby
+
+def valid_passport? (passport, fields)
+    fields.each do |field|
+        return false if !(passport.has_key?(field.to_sym))
+    end
+    true
+end
+
+text = File.read('./input')
+passports = Hash.new
+key = 0
+passport = Hash.new
+
+required_fields = [
+    "byr",
+    "iyr",
+    "eyr",
+    "hgt",
+    "hcl",
+    "ecl",
+    "pid",
+#    "cid"
+]
+
+results = {
+    :valid => 0,
+    :invalid => 0
+}
+
+text.each_line do |line|
+    line.strip!
+    if line == ''
+        passports[key] = passport
+        passport = Hash.new
+        key += 1
+        next
+    end
+    line.split(' ').each do |pair|
+        pair = pair.split(":")
+        passport[pair[0].to_sym] = pair[1]
+    end
+end
+passports[key] = passport
+
+passports.each_value do |passport|
+    if valid_passport?(passport, required_fields)
+        results[:valid] += 1
+    else
+        results[:invalid] += 1
+    end
+end
+
+pp results
+