diff --git a/hfmt.cabal b/hfmt.cabal
--- a/hfmt.cabal
+++ b/hfmt.cabal
@@ -1,5 +1,5 @@
 name:                hfmt
-version:             0.2.3.0
+version:             0.2.3.1
 synopsis:            Haskell source code formatter
 description:         Inspired by gofmt. Built using hlint, hindent, and stylish-haskell.
 license:             MIT
@@ -11,7 +11,7 @@
 bug-reports:         http://github.com/danstiner/hfmt/issues
 category:            Language
 build-type:          Simple
-extra-source-files:  README.md, .stylish-haskell.yaml
+extra-source-files:  README.md, .stylish-haskell.yaml, stack.yaml
 cabal-version:       >=1.9.2
 tested-with:         GHC == 8.0.2, GHC == 8.2.2, GHC == 8.4.2, GHC == 8.5
 
diff --git a/stack.yaml b/stack.yaml
new file mode 100644
--- /dev/null
+++ b/stack.yaml
@@ -0,0 +1,7 @@
+resolver: lts-12.6
+flags: {}
+packages:
+- '.'
+extra-deps:
+  - stylish-haskell-0.9.2.0
+  - hindent-5.2.7