diff --git a/Network/Haskoin/Node/HeaderTree.hs b/Network/Haskoin/Node/HeaderTree.hs
--- a/Network/Haskoin/Node/HeaderTree.hs
+++ b/Network/Haskoin/Node/HeaderTree.hs
@@ -30,6 +30,9 @@
 , nodeHeader
 , nodePrev
 , nodeTimestamp
+, nodeWork
+, nodeHeight
+, nodeChain
 , isBestChain
 , isChainReorg
 , isSideChain
@@ -101,6 +104,15 @@
 
 nodeTimestamp :: NodeBlock -> Timestamp
 nodeTimestamp = blockTimestamp . nodeHeader
+
+nodeWork :: NodeBlock -> Work
+nodeWork = nodeBlockWork
+
+nodeHeight :: NodeBlock -> BlockHeight
+nodeHeight = nodeBlockHeight
+
+nodeChain :: NodeBlock -> Word32
+nodeChain = nodeBlockChain
 
 -- | Number of blocks on average between difficulty cycles (2016 blocks).
 diffInterval :: Word32
diff --git a/haskoin-node.cabal b/haskoin-node.cabal
--- a/haskoin-node.cabal
+++ b/haskoin-node.cabal
@@ -1,5 +1,5 @@
 name:                  haskoin-node
-version:               0.4.0
+version:               0.4.1
 synopsis:
     Implementation of a Bitoin node.
 description:
@@ -19,12 +19,12 @@
 
 homepage:              http://github.com/haskoin/haskoin
 bug-reports:           http://github.com/haskoin/haskoin/issues
-tested-with:           GHC==7.10.3, GHC==7.10.2, GHC==7.10.1
+tested-with:           GHC==8.0.2
 stability:             stable
 license:               PublicDomain
 license-file:          UNLICENSE
 author:                Philippe Laprade, Jean-Pierre Rupp
-maintainer:            plaprade+hackage@gmail.com
+maintainer:            xenog@protonmail.com
 category:              Bitcoin, Finance, Network
 build-type:            Simple
 cabal-version:         >= 1.9.2
@@ -48,7 +48,7 @@
                 RecordWildCards
                 DeriveDataTypeable
 
-    build-depends: aeson                    >= 0.7          && < 0.12
+    build-depends: aeson                    >= 0.7          && < 1.1
                  , async                    >= 2.0          && < 2.2
                  , base                     >= 4.8          && < 5
                  , bytestring               >= 0.10         && < 0.11
@@ -57,10 +57,10 @@
                  , conduit                  >= 1.2          && < 1.3
                  , conduit-extra            >= 1.1          && < 1.2
                  , containers               >= 0.5          && < 0.6
-                 , data-default             >= 0.5          && < 0.6
+                 , data-default             >= 0.5          && < 0.8
                  , deepseq                  >= 1.4          && < 1.5
                  , either                   >= 4.3          && < 4.5
-                 , esqueleto                >= 2.4          && < 2.5
+                 , esqueleto                >= 2.4          && < 2.6
                  , exceptions               >= 0.8          && < 0.9
                  , haskoin-core             >= 0.3          && < 0.5
                  , largeword                >= 1.2.4        && < 1.3
@@ -70,13 +70,13 @@
                  , monad-logger             >= 0.3          && < 0.4
                  , mtl                      >= 2.2          && < 2.3
                  , network                  >= 2.4          && < 2.7
-                 , persistent               >= 2.2          && < 2.3
-                 , persistent-template      >= 2.1          && < 2.2
+                 , persistent               >= 2.2          && < 2.7
+                 , persistent-template      >= 2.1          && < 2.6
                  , resource-pool            >= 0.2          && < 0.3
                  , random                   >= 1.0          && < 1.2
                  , stm                      >= 2.4          && < 2.5
                  , stm-chans                >= 3.0          && < 3.1
-                 , stm-conduit              >= 2.5          && < 2.9
+                 , stm-conduit              >= 2.5          && < 3.1
                  , string-conversions       >= 0.4          && < 0.5
                  , text                     >= 0.11         && < 1.3
                  , time                     >= 1.4          && < 1.7
@@ -95,12 +95,12 @@
     build-depends: base                           >= 4.8        && < 5
                  , haskoin-core
                  , haskoin-node
-                 , HUnit                          >= 1.2        && < 1.4
-                 , QuickCheck                     >= 2.6        && < 2.9
+                 , HUnit                          >= 1.2        && < 1.6
+                 , QuickCheck                     >= 2.6        && < 2.10
                  , monad-logger                   >= 0.3        && < 0.4
                  , mtl                            >= 2.2        && < 2.3
-                 , persistent                     >= 2.2        && < 2.3
-                 , persistent-sqlite              >= 2.2        && < 2.3
+                 , persistent                     >= 2.2        && < 2.7
+                 , persistent-sqlite              >= 2.2        && < 2.7
                  , resourcet                      >= 1.1        && < 1.2
                  , test-framework                 >= 0.8        && < 0.9
                  , test-framework-quickcheck2     >= 0.3        && < 0.4
