diff --git a/stack.yaml b/stack.yaml
index 4f74548..e06f1af 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,35 +1,9 @@
-# This file was automatically generated by stack init
-# For more information, see: http://docs.haskellstack.org/en/stable/yaml_configuration/
+resolver: lts-9.5
 
-# Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2)
-resolver: lts-5.12
-
-# Local packages, usually specified by relative directory name
 packages:
 - '.'
-# Packages to be pulled from upstream that are not in the resolver (e.g., acme-missiles-0.3)
 extra-deps: []
 
-# Override default flag values for local packages and extra-deps
 flags: {}
 
-# Extra package databases containing global packages
 extra-package-dbs: []
-
-# Control whether we use the GHC we find on the path
-# system-ghc: true
-
-# Require a specific version of stack, using version ranges
-# require-stack-version: -any # Default
-# require-stack-version: >= 1.0.0
-
-# Override the architecture used by stack, especially useful on Windows
-# arch: i386
-# arch: x86_64
-
-# Extra directories used by stack for building
-# extra-include-dirs: [/path/to/dir]
-# extra-lib-dirs: [/path/to/dir]
-
-# Allow a newer minor version of GHC than the snapshot specifies
-# compiler-check: newer-minor