diff --git a/differential.cabal b/differential.cabal
--- a/differential.cabal
+++ b/differential.cabal
@@ -1,5 +1,5 @@
 name:                differential
-version:             0.2.0.0
+version:             0.2.0.1
 synopsis:            Finds out whether an entity comes from different distributions (statuses).
 description:         Uses statistical tests to find whether an entity comes from one or two distributions.
 homepage:            http://github.com/GregorySchwartz/differential#readme
diff --git a/src/Utility.hs b/src/Utility.hs
--- a/src/Utility.hs
+++ b/src/Utility.hs
@@ -83,4 +83,4 @@
     getFDRCritical _ Nothing     = Nothing
     getFDRCritical rank (Just _) = Just . FDR $ alpha * (rank / m)
     getQValue _ Nothing     = Nothing
-    getQValue rank (Just (PValue p)) = Just . QValue $ p * (m / rank)
+    getQValue rank (Just (PValue p)) = Just . QValue . min 1 $ p * (m / rank)