diff --git a/gnss-converters.cabal b/gnss-converters.cabal
--- a/gnss-converters.cabal
+++ b/gnss-converters.cabal
@@ -1,5 +1,5 @@
 name:                  gnss-converters
-version:               0.1.3
+version:               0.1.4
 synopsis:              GNSS Converters.
 description:           Haskell bindings for GNSS converters.
 homepage:              http://github.com/swift-nav/gnss-converters
diff --git a/main/RTCM32SBP.hs b/main/RTCM32SBP.hs
--- a/main/RTCM32SBP.hs
+++ b/main/RTCM32SBP.hs
@@ -19,8 +19,8 @@
 
 main :: IO ()
 main = runResourceT $
-  sourceHandle stdin  =$=
-  conduitDecode       =$=
-  CL.mapMaybe convert =$=
-  conduitEncode       $$
+  sourceHandle stdin   =$=
+  conduitDecode        =$=
+  CL.mapMaybeM convert =$=
+  conduitEncode        $$
   sinkHandle stdout