diff --git a/cabal.project.freeze b/cabal.project.freeze
new file mode 100644
index 0000000..d47bd64
--- /dev/null
+++ b/cabal.project.freeze
@@ -0,0 +1,79 @@
+constraints: any.Cabal ==2.2.0.1,
+             any.HUnit ==1.6.0.0,
+             any.IfElse ==0.85,
+             any.QuickCheck ==2.12.4,
+             QuickCheck +templatehaskell,
+             any.alex ==3.2.4,
+             alex +small_base,
+             any.ansi-terminal ==0.8.1,
+             ansi-terminal -example,
+             any.array ==0.5.2.0,
+             any.base ==4.11.1.0,
+             any.binary ==0.8.5.1,
+             any.bytestring ==0.10.8.2,
+             any.cairo ==0.13.5.0,
+             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.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,
+             glib +closure_signals,
+             any.gtk2hs-buildtools ==0.13.4.0,
+             gtk2hs-buildtools +closuresignals,
+             any.gtk3 ==0.15.0,
+             gtk3 -build-demos +fmode-binary +have-gio,
+             any.happy ==1.19.9,
+             happy +small_base,
+             any.hashable ==1.2.7.0,
+             hashable -examples +integer-gmp +sse2 -sse41,
+             any.hashtables ==1.2.3.1,
+             hashtables -bounds-checking -debug -portable -sse42 +unsafe-tricks,
+             any.hinotify-bytestring ==0.3.8.1,
+             any.hpath ==0.9.2,
+             any.hspec ==2.5.6,
+             any.hspec-core ==2.5.6,
+             any.hspec-discover ==2.5.6,
+             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.old-locale ==1.0.0.7,
+             any.pango ==0.13.5.0,
+             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.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,
+             simple-sendfile +allow-bsd,
+             any.stm ==2.4.5.1,
+             any.template-haskell ==2.13.0.0,
+             any.text ==1.2.3.0,
+             any.tf-random ==0.5,
+             any.time ==1.8.0.2,
+             any.transformers ==0.5.5.0,
+             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,
+             vector +boundschecks -internalchecks -unsafechecks -wall,
+             any.word8 ==0.1.3