diff --git a/x509.cabal b/x509.cabal
--- a/x509.cabal
+++ b/x509.cabal
@@ -1,5 +1,5 @@
 Name:                x509
-Version:             1.6.5
+version:             1.7.0
 Description:         X509 reader and writer
 License:             BSD3
 License-file:        LICENSE
@@ -11,9 +11,10 @@
 Category:            Data
 stability:           experimental
 Homepage:            http://github.com/vincenthz/hs-certificate
-Cabal-Version:       >=1.8
+Cabal-Version:       >= 1.10
 
 Library
+  Default-Language:  Haskell2010
   Build-Depends:     base >= 3 && < 5
                    , bytestring
                    , memory
@@ -41,6 +42,7 @@
   ghc-options:       -Wall
 
 Test-Suite test-x509
+  Default-Language:  Haskell2010
   type:              exitcode-stdio-1.0
   hs-source-dirs:    Tests
   Main-is:           Tests.hs