diff --git a/mappings.cabal b/mappings.cabal
--- a/mappings.cabal
+++ b/mappings.cabal
@@ -5,9 +5,9 @@
 -- see: https://github.com/sol/hpack
 
 name:           mappings
-version:        0.2.1.0
+version:        0.2.2.0
 synopsis:       Types which represent functions k -> v
-description:    Please read README.md on github
+description:    A typeclass and a number of implementations; please read README.md on github
 category:       Data structures
 homepage:       https://github.com/jcranch/mapping#readme
 bug-reports:    https://github.com/jcranch/mapping/issues
@@ -16,7 +16,7 @@
 copyright:      2023 James Cranch
 license:        BSD-3-Clause
 build-type:     Simple
-extra-source-files:
+extra-doc-files:
     README.md
     CHANGELOG.md
 
@@ -42,7 +42,7 @@
   build-depends:
       base >=4.16 && <4.20
     , cond >=0.5.1 && <0.6
-    , containers >=0.6.6 && <0.8
+    , containers >=0.6.5 && <0.8
     , formatting >=7.0.0 && <7.3
     , indexed-traversable >=0.1.1 && <0.2
     , partialord >=0.0.2 && <0.1
@@ -60,7 +60,7 @@
   build-depends:
       base >=4.16 && <4.20
     , cond >=0.5.1 && <0.6
-    , containers >=0.6.6 && <0.8
+    , containers >=0.6.5 && <0.8
     , formatting >=7.0.0 && <7.3
     , indexed-traversable >=0.1.1 && <0.2
     , mappings
@@ -80,10 +80,12 @@
   hs-source-dirs:
       test
   ghc-options: -Wall -Wcompat -Wincomplete-record-updates -Wincomplete-uni-patterns -Wredundant-constraints -threaded -rtsopts -with-rtsopts=-N
+  build-tool-depends:
+      hspec-discover:hspec-discover ==2.11.*
   build-depends:
       base >=4.16 && <4.20
     , cond >=0.5.1 && <0.6
-    , containers >=0.6.6 && <0.8
+    , containers >=0.6.5 && <0.8
     , formatting >=7.0.0 && <7.3
     , hspec ==2.11.*
     , indexed-traversable >=0.1.1 && <0.2