From 7212448445b57aad260cc710d5ced7e9aa23e713 Mon Sep 17 00:00:00 2001
From: Taylor Fausak <taylor@fausak.me>
Date: Sat, 10 Apr 2021 14:06:37 -0400
Subject: [PATCH] Add dependency version constraints

---
 README.markdown | 1 -
 witch.cabal     | 6 +++---
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/README.markdown b/README.markdown
index 4a335c5..fc86441 100644
--- a/README.markdown
+++ b/README.markdown
@@ -9,6 +9,5 @@
 ## To do
 
 - [ ] Upgrade Stackage snapshot.
-- [ ] Add dependency version constraints.
 - [ ] Add instances for `Word*` and `Natural`.
 - [ ] Add more instances ...
diff --git a/witch.cabal b/witch.cabal
index 9867794..c01dd3b 100644
--- a/witch.cabal
+++ b/witch.cabal
@@ -18,8 +18,8 @@ source-repository head
 
 library
   build-depends:
-    base
-    , template-haskell
+    base >= 4.13.0 && < 4.16
+    , template-haskell >= 2.15.0 && < 2.18
   default-language: Haskell2010
   exposed-modules:
     Witch
@@ -53,7 +53,7 @@ library
 test-suite test
   build-depends:
     base
-    , HUnit
+    , HUnit >= 1.6.2 && < 1.7
     , witch
   default-language: Haskell2010
   hs-source-dirs: src/test