diff --git a/package.yaml b/package.yaml
--- a/package.yaml
+++ b/package.yaml
@@ -1,5 +1,5 @@
 name: salve
-version: 1.0.4
+version: 1.0.6
 
 category: Distribution
 description:
@@ -16,7 +16,7 @@
 synopsis: Semantic version numbers and constraints.
 
 dependencies:
-  base: '>= 4.9.0 && < 4.12'
+  base: '>= 4.9.0 && < 4.13'
 ghc-options:
   - -Weverything
   - -Wno-implicit-prelude
diff --git a/salve.cabal b/salve.cabal
--- a/salve.cabal
+++ b/salve.cabal
@@ -1,11 +1,11 @@
--- This file has been generated from package.yaml by hpack version 0.20.0.
+-- This file has been generated from package.yaml by hpack version 0.28.2.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: e685fcce35f5fb8bbe18c7be2be724d2ee7ec8d03742c121ee4fa94e6e6c7cc1
+-- hash: 51090f4f73e7c88bd71427ce38292e4d550fda736c4ed5987ccf8d67960f7d88
 
 name:           salve
-version:        1.0.4
+version:        1.0.6
 synopsis:       Semantic version numbers and constraints.
 description:    Salve provides semantic version (SemVer) numbers and constraints (ranges).
 category:       Distribution
@@ -16,7 +16,6 @@
 license-file:   LICENSE.markdown
 build-type:     Simple
 cabal-version:  >= 1.10
-
 extra-source-files:
     CHANGELOG.markdown
     package.yaml
@@ -28,27 +27,27 @@
   location: https://github.com/tfausak/salve
 
 library
-  hs-source-dirs:
-      library
-  ghc-options: -Weverything -Wno-implicit-prelude -Wno-safe -Wno-unsafe
-  build-depends:
-      base >=4.9.0 && <4.12
   exposed-modules:
       Salve
       Salve.Internal
   other-modules:
       Paths_salve
+  hs-source-dirs:
+      library
+  ghc-options: -Weverything -Wno-implicit-prelude -Wno-safe -Wno-unsafe
+  build-depends:
+      base >=4.9.0 && <4.13
   default-language: Haskell2010
 
 test-suite doctest
   type: exitcode-stdio-1.0
   main-is: Main.hs
+  other-modules:
+      Paths_salve
   hs-source-dirs:
       tests
   ghc-options: -Weverything -Wno-implicit-prelude -Wno-safe -Wno-unsafe -rtsopts -threaded
   build-depends:
-      base >=4.9.0 && <4.12
+      base >=4.9.0 && <4.13
     , doctest >=0.11.0 && <0.17
-  other-modules:
-      Paths_salve
   default-language: Haskell2010
diff --git a/stack.yaml b/stack.yaml
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,1 +1,1 @@
-resolver: lts-12.0
+resolver: nightly-2018-10-01