diff --git a/pipes-ordered-zip.cabal b/pipes-ordered-zip.cabal
--- a/pipes-ordered-zip.cabal
+++ b/pipes-ordered-zip.cabal
@@ -1,6 +1,6 @@
 cabal-version: >=1.10
 name: pipes-ordered-zip
-version: 1.0.0.1
+version: 1.0.1
 license: BSD3
 license-file: LICENSE
 copyright: 2019 Stephan Schiffels
@@ -23,7 +23,7 @@
     default-language: Haskell2010
     build-depends:
         base >=4.7 && <5,
-        pipes >=4.3.9 && <4.4
+        pipes >=4.3.9
 
 test-suite pipes-ordered-zip-tests
     type: exitcode-stdio-1.0
@@ -31,7 +31,7 @@
     hs-source-dirs: src-tests
     default-language: Haskell2010
     build-depends:
-        base >=4.12.0.0 && <4.13,
+        base >=4.12.0.0,
         pipes-ordered-zip -any,
-        pipes >=4.3.9 && <4.4,
-        foldl >=1.4.5 && <1.5
+        pipes >=4.3.9,
+        foldl >=1.4.5
diff --git a/src/Pipes/OrderedZip.hs b/src/Pipes/OrderedZip.hs
--- a/src/Pipes/OrderedZip.hs
+++ b/src/Pipes/OrderedZip.hs
@@ -4,8 +4,10 @@
 import Pipes (Producer, next, yield, lift)
 
 -- |orderedZip takes a comparison function and two producers and merges them 
--- together, creating a new Producer that yields pairs or Maybes of the two 
--- datatables provided by the two original producers
+-- together, creating a new Producer that yields pairs of Maybes of the two 
+-- datatables provided by the two original producers.
+-- The output pairs reflect the Union of the two input producers, with Nothings indicating
+-- missing data in one of the producers at that location.
 orderedZip :: (Monad m) => (a -> b -> Ordering) -- ^The function to compare types of a with b
            -> Producer a m r1 -- ^The first producer (has to be ordered)
            -> Producer b m r2 -- ^The second producer (has to be ordered)