diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -34,3 +34,4 @@
 ## Contributors
 
 * [Simon Hengel](https://github.com/sol)
+* [Alberto Valverde](https://github.com/albertov)
diff --git a/cron.cabal b/cron.cabal
--- a/cron.cabal
+++ b/cron.cabal
@@ -1,5 +1,5 @@
 Name:                cron
-Version:             0.2.0
+Version:             0.2.1
 Description:
   Cron data structure and Attoparsec parser. The idea is to embed it in larger
   systems which want to roll their own scheduled tasks in a format that people
@@ -50,7 +50,7 @@
                   cron,
                   hspec == 1.3.*,
                   hspec-expectations,
-                  attoparsec      == 0.10.*,
+                  attoparsec      >= 0.10,
                   text            >= 0.11 && < 2,
                   time            >= 1.4
 
diff --git a/src/System/Cron.hs b/src/System/Cron.hs
--- a/src/System/Cron.hs
+++ b/src/System/Cron.hs
@@ -200,6 +200,9 @@
               -> CronField
               -> Bool
 matchField _ _ Star                      = True
+matchField x CDayOfWeek (SpecificField y)
+  | x == y || x == 0 && y == 7 || x == 7 && y == 0 = True
+  | otherwise                                      = False
 matchField x _ (SpecificField y)         = x == y
 matchField x _ (RangeField y y')         = x >= y && x <= y'
 matchField x unit (ListField fs)         = any (matchField x unit) fs
diff --git a/test/System/Cron/ParserSpec.hs b/test/System/Cron/ParserSpec.hs
--- a/test/System/Cron/ParserSpec.hs
+++ b/test/System/Cron/ParserSpec.hs
@@ -79,6 +79,12 @@
   it "parses steps at the last field" $
     assertSuccessfulParse "* * * * */4"
                            stars { dayOfWeek  = DaysOfWeek (StepField Star 4) }
+  it "parses a sunday as 7" $
+    assertSuccessfulParse "* * * * 7"
+                           stars { dayOfWeek  = DaysOfWeek (SpecificField 7) }
+  it "parses a sunday as 0" $
+    assertSuccessfulParse "* * * * 0"
+                           stars { dayOfWeek  = DaysOfWeek (SpecificField 0) }
   where assertSuccessfulParse = assertParse cronSchedule
         assertFailedParse = assertNoParse cronSchedule 
 
diff --git a/test/System/CronSpec.hs b/test/System/CronSpec.hs
--- a/test/System/CronSpec.hs
+++ b/test/System/CronSpec.hs
@@ -57,6 +57,16 @@
                             dayOfMonth = DaysOfMonth (SpecificField 3),
                             hour       = Hours (RangeField 10 14) }
                     (day 5 3 13 2)
+  it "matches a monday as 1" $
+    scheduleMatches stars { dayOfWeek  = DaysOfWeek (SpecificField 1) }
+                    (UTCTime (fromGregorian 2014 3 17) 0)
+  it "matches a sunday as 0" $
+    scheduleMatches stars { dayOfWeek  = DaysOfWeek (SpecificField 0) }
+                    (UTCTime (fromGregorian 2014 3 16) 0)
+  it "matches a sunday as 7" $
+    scheduleMatches stars { dayOfWeek  = DaysOfWeek (SpecificField 7) }
+                    (UTCTime (fromGregorian 2014 3 16) 0)
+
   where day m d h mn = UTCTime (fromGregorian 2012 m d) (diffTime h mn)
         diffTime h mn = timeOfDayToTime $ TimeOfDay h mn 0