diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog for the Clash project
 
+## 1.4.2 *May 18th 2021*
+Fixed:
+
+ * Erroneous examples in `Clash.Annotation.TopEntity` documentation [#646](https://github.com/clash-lang/clash-compiler/issues/646) and [#654](https://github.com/clash-lang/clash-compiler/issues/654)
+ * `unconcat` cannot be used as initial/reset value for a `register` [#1756](https://github.com/clash-lang/clash-compiler/issues/1756)
+ * `showX` now doesn't crash if a spine of a `Vec` is undefined
+ * `~ISACTIVEENABLE` in blackboxes works again, and now acts on `Signal dom Bool` in addition to `Enable dom`. Since [#1368](https://github.com/clash-lang/clash-compiler/pull/1368), enable lines were always generated even if they were known to be always enabled. Fixes [#1786](https://github.com/clash-lang/clash-compiler/issues/1786).
+ * clash --show-options now shows -fclash-* options in GHC 9.0 [#1787](https://github.com/clash-lang/clash-compiler/issues/1787)
+ * `makeRecursiveGroups` now correctly identifies mutual recursion between global binders ([#1796](https://github.com/clash-lang/clash-compiler/issues/1796)).
+
 ## 1.4.1 *April 6th 2021*
 Fixed:
 
diff --git a/clash-ghc.cabal b/clash-ghc.cabal
--- a/clash-ghc.cabal
+++ b/clash-ghc.cabal
@@ -1,6 +1,6 @@
 Cabal-version:        2.2
 Name:                 clash-ghc
-Version:              1.4.1
+Version:              1.4.2
 Synopsis:             Clash: a functional hardware description language - GHC frontend
 Description:
   Clash is a functional hardware description language that borrows both its
@@ -163,8 +163,8 @@
                       transformers              >= 0.5.2.0  && < 0.6,
                       unordered-containers      >= 0.2.1.0  && < 0.3,
 
-                      clash-lib                 == 1.4.1,
-                      clash-prelude             == 1.4.1,
+                      clash-lib                 == 1.4.2,
+                      clash-prelude             == 1.4.2,
                       concurrent-supply         >= 0.1.7    && < 0.2,
                       ghc-typelits-extra        >= 0.3.2    && < 0.5,
                       ghc-typelits-knownnat     >= 0.6      && < 0.8,
diff --git a/src-bin-9.0/Clash/Main.hs b/src-bin-9.0/Clash/Main.hs
--- a/src-bin-9.0/Clash/Main.hs
+++ b/src-bin-9.0/Clash/Main.hs
@@ -160,7 +160,7 @@
                    ShowSupportedExtensions   -> showSupportedExtensions (Just libDir)
                    ShowVersion               -> showVersion
                    ShowNumVersion            -> putStrLn cProjectVersion
-                   ShowOptions isInteractive -> showOptions isInteractive
+                   ShowOptions isInteractive -> showOptions isInteractive r
         Right postStartupMode ->
             -- start our GHC session
             GHC.runGhc (Just libDir) $ do
@@ -878,12 +878,13 @@
                                 , ")"
                                 ]
 
-showOptions :: Bool -> IO ()
-showOptions isInteractive = putStr (unlines availableOptions)
+showOptions :: Bool -> IORef ClashOpts -> IO ()
+showOptions isInteractive = putStr . unlines . availableOptions
     where
-      availableOptions = concat [
+      availableOptions opts = concat [
         flagsForCompletion isInteractive,
-        map ('-':) (getFlagNames mode_flags)
+        map ('-':) (getFlagNames mode_flags),
+        map ('-':) (getFlagNames (flagsClash opts))
         ]
       getFlagNames opts         = map flagName opts
 
diff --git a/src-ghc/Clash/GHC/LoadModules.hs b/src-ghc/Clash/GHC/LoadModules.hs
--- a/src-ghc/Clash/GHC/LoadModules.hs
+++ b/src-ghc/Clash/GHC/LoadModules.hs
@@ -2,8 +2,9 @@
   Copyright   :  (C) 2013-2016, University of Twente,
                      2016-2017, Myrtle Software Ltd,
                      2017     , Google Inc.
+                     2021     , QBayLogic B.V.
   License     :  BSD2 (see the file LICENSE)
-  Maintainer  :  Christiaan Baaij <christiaan.baaij@gmail.com>
+  Maintainer  :  QBayLogic B.V. <devops@qbaylogic.com>
 -}
 
 {-# LANGUAGE CPP #-}
@@ -651,11 +652,11 @@
       Digraph.DigraphNode
         (b,e)
         (Var.varUnique b)
-        (UniqSet.nonDetKeysUniqSet (CoreFVs.exprFreeIds e))
+        (UniqSet.nonDetKeysUniqSet (CoreFVs.exprSomeFreeVars Var.isId e))
 #else
       ((b,e)
       ,Var.varUnique b
-      ,UniqSet.nonDetKeysUniqSet (CoreFVs.exprFreeIds e))
+      ,UniqSet.nonDetKeysUniqSet (CoreFVs.exprSomeFreeVars Var.isId e))
 #endif
 
     makeBind