diff --git a/equational-reasoning.cabal b/equational-reasoning.cabal
--- a/equational-reasoning.cabal
+++ b/equational-reasoning.cabal
@@ -2,7 +2,7 @@
 --  documentation, see http://haskell.org/cabal/users-guide/
 
 name:                equational-reasoning
-version:             0.6.0.2
+version:             0.6.0.3
 synopsis:            Proof assistant for Haskell using DataKinds & PolyKinds
 description:         A simple convenient library to write equational / preorder proof as in Agda.
                      Since 0.6.0.0, this no longer depends on @singletons@ package, and the @Proof.Induction@ module goes to @equational-reasoning-induction@ package.
@@ -14,8 +14,7 @@
 category:            Math
 build-type:          Simple
 tested-with:         GHC == 8.0.2, GHC == 8.2.2, GHC == 8.4.1, GHC == 8.6.5, GHC == 8.8.2
-cabal-version:       >=1.8
-
+cabal-version:       >=1.10
 source-repository head
     type: git
     location: git://github.com/konn/equational-reasoning-in-haskell.git
@@ -28,7 +27,7 @@
   ghc-options:         -Wall
   build-depends:       base             >= 4      && < 5
                      , containers       >= 0.5    && < 0.7
-                     , template-haskell >= 2.11   && < 2.16
+                     , template-haskell >= 2.11   && < 2.17
                      , th-extras        == 0.0.*
                      , void             >= 0.6    && < 0.8
   if impl(ghc >= 8.4)
@@ -36,3 +35,4 @@
   else
      build-depends:    semigroups       == 0.18.*
      build-depends:    th-desugar       >= 1.6 && < 1.8
+  default-language:    Haskell2010