diff --git a/.gitignore b/.gitignore
index a047940..1bb5cea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 dist-newstyle/
 dist/
+.stack-work/
diff --git a/stack.yaml b/stack.yaml
new file mode 100644
index 0000000..de6baeb
--- /dev/null
+++ b/stack.yaml
@@ -0,0 +1,66 @@
+# This file was automatically generated by 'stack init'
+#
+# Some commonly used options have been documented as comments in this file.
+# For advanced use and comprehensive documentation of the format, please see:
+# https://docs.haskellstack.org/en/stable/yaml_configuration/
+
+# Resolver to choose a 'specific' stackage snapshot or a compiler version.
+# A snapshot resolver dictates the compiler version and the set of packages
+# to be used for project dependencies. For example:
+#
+# resolver: lts-3.5
+# resolver: nightly-2015-09-21
+# resolver: ghc-7.10.2
+# resolver: ghcjs-0.1.0_ghc-7.10.2
+#
+# The location of a snapshot can be provided as a file or url. Stack assumes
+# a snapshot provided as a file might change, whereas a url resource does not.
+#
+# resolver: ./custom-snapshot.yaml
+# resolver: https://example.com/snapshots/2018-01-01.yaml
+resolver: lts-11.19
+
+# User packages to be built.
+# Various formats can be used as shown in the example below.
+#
+# packages:
+# - some-directory
+# - https://example.com/foo/bar/baz-0.0.2.tar.gz
+# - location:
+#    git: https://github.com/commercialhaskell/stack.git
+#    commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+# - location: https://github.com/commercialhaskell/stack/commit/e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#  subdirs:
+#  - auto-update
+#  - wai
+packages:
+- vault-tool
+- vault-tool-server
+# Dependency packages to be pulled from upstream that are not in the resolver
+# using the same syntax as the packages field.
+# (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: ">=1.7"
+#
+# 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
\ No newline at end of file
diff --git a/vault-tool-server/vault-tool-server.cabal b/vault-tool-server/vault-tool-server.cabal
index 7e644ba..b565bd8 100644
--- a/vault-tool-server/vault-tool-server.cabal
+++ b/vault-tool-server/vault-tool-server.cabal
@@ -21,7 +21,7 @@ source-repository head
 library
   exposed-modules:     Network.VaultTool.VaultServerProcess
 
-  build-depends:       base >=4.8 && <4.11,
+  build-depends:       base >=4.8 && < 5,
                        vault-tool >=0.1.0.0,
                        aeson,
                        async,
diff --git a/vault-tool/vault-tool.cabal b/vault-tool/vault-tool.cabal
index 9d85275..c2e101d 100644
--- a/vault-tool/vault-tool.cabal
+++ b/vault-tool/vault-tool.cabal
@@ -24,7 +24,7 @@ library
   other-modules:       Network.VaultTool.Internal,
                        Network.VaultTool.Types
 
-  build-depends:       base >=4.8 && <4.11,
+  build-depends:       base >=4.8 && < 5,
                        text,
                        bytestring,
                        http-client,