diff --git a/cabal.project b/cabal.project
index 20be325..419f7fb 100644
--- a/cabal.project
+++ b/cabal.project
@@ -1,4 +1,4 @@
-with-compiler: ghc-8.4.3
+with-compiler: ghc-8.6.4
 
 packages: .
 
diff --git a/cabal.project.freeze b/cabal.project.freeze
index 320d858..9a491cf 100644
--- a/cabal.project.freeze
+++ b/cabal.project.freeze
@@ -1,36 +1,36 @@
-constraints: any.Cabal ==2.2.0.1,
+constraints: any.Cabal ==2.4.0.1,
              any.HUnit ==1.6.0.0,
              any.IfElse ==0.85,
-             any.QuickCheck ==2.12.4,
+             any.QuickCheck ==2.12.6.1,
              QuickCheck +templatehaskell,
              any.alex ==3.2.4,
              alex +small_base,
-             any.ansi-terminal ==0.8.1,
+             any.ansi-terminal ==0.9,
              ansi-terminal -example,
-             any.array ==0.5.2.0,
-             any.base ==4.11.1.0,
-             any.binary ==0.8.5.1,
+             any.array ==0.5.3.0,
+             any.base ==4.12.0.0,
+             any.binary ==0.8.6.0,
              any.bytestring ==0.10.8.2,
-             any.cairo ==0.13.5.0,
+             any.cairo ==0.13.6.0,
              cairo +cairo_pdf +cairo_ps +cairo_svg,
              any.call-stack ==0.1.0,
              any.clock ==0.7.2,
              clock -llvm,
              any.colour ==2.3.4,
-             any.containers ==0.5.11.0,
-             any.deepseq ==1.4.3.0,
-             any.directory ==1.3.1.5,
+             any.containers ==0.6.0.1,
+             any.deepseq ==1.4.4.0,
+             any.directory ==1.3.3.0,
              any.erf ==2.0.0.0,
              any.exceptions ==0.10.0,
-             any.filepath ==1.4.2,
-             any.ghc-boot-th ==8.4.3,
-             any.ghc-prim ==0.5.2.0,
-             any.gio ==0.13.5.0,
-             any.glib ==0.13.6.0,
+             any.filepath ==1.4.2.1,
+             any.ghc-boot-th ==8.6.4,
+             any.ghc-prim ==0.5.3,
+             any.gio ==0.13.6.0,
+             any.glib ==0.13.7.0,
              glib +closure_signals,
-             any.gtk2hs-buildtools ==0.13.4.0,
+             any.gtk2hs-buildtools ==0.13.5.0,
              gtk2hs-buildtools +closuresignals,
-             any.gtk3 ==0.15.0,
+             any.gtk3 ==0.15.1,
              gtk3 -build-demos +fmode-binary +have-gio,
              any.happy ==1.19.9,
              happy +small_base,
@@ -40,40 +40,42 @@ constraints: any.Cabal ==2.2.0.1,
              hashtables -bounds-checking -debug -portable -sse42 +unsafe-tricks,
              any.hinotify-bytestring ==0.3.8.1,
              any.hpath ==0.9.2,
-             any.hspec ==2.5.7,
-             any.hspec-core ==2.5.7,
-             any.hspec-discover ==2.5.7,
+             any.hsc2hs ==0.68.4,
+             hsc2hs -in-ghc-tree,
+             any.hspec ==2.7.0,
+             any.hspec-core ==2.7.0,
+             any.hspec-discover ==2.7.0,
              any.hspec-expectations ==0.8.2,
              any.integer-gmp ==1.0.2.0,
              any.monad-loops ==0.4.3,
              monad-loops +base4,
              any.mtl ==2.2.2,
-             any.network ==2.8.0.0,
+             any.network ==3.0.1.0,
              any.old-locale ==1.0.0.7,
-             any.pango ==0.13.5.0,
+             any.pango ==0.13.6.0,
              pango +new-exception,
              any.parsec ==3.1.13.0,
              any.pretty ==1.1.3.6,
              any.primitive ==0.6.4.0,
-             any.process ==1.6.3.0,
+             any.process ==1.6.5.0,
              any.quickcheck-io ==0.2.0,
              any.random ==1.1,
              any.rts ==1.0,
              any.safe ==0.3.17,
              any.setenv ==0.1.1.3,
-             any.simple-sendfile ==0.2.27,
+             any.simple-sendfile ==0.2.28,
              simple-sendfile +allow-bsd,
              any.stm ==2.5.0.0,
-             any.template-haskell ==2.13.0.0,
-             any.text ==1.2.3.0,
+             any.template-haskell ==2.14.0.0,
+             any.text ==1.2.3.1,
              any.tf-random ==0.5,
              any.time ==1.8.0.2,
-             any.transformers ==0.5.5.0,
+             any.transformers ==0.5.6.2,
              any.transformers-compat ==0.6.2,
              transformers-compat -five +five-three -four +generic-deriving +mtl -three -two,
              any.unix ==2.7.2.2,
              any.unix-bytestring ==0.3.7.3,
              any.utf8-string ==1.0.1.1,
-             any.vector ==0.12.0.1,
+             any.vector ==0.12.0.2,
              vector +boundschecks -internalchecks -unsafechecks -wall,
              any.word8 ==0.1.3