Merge PR #473.

kazu-yamamoto · kazu-yamamoto · commit 77f4296faf7e · 2020-08-12T10:49:14.000+09:00
diff --git a/network.cabal b/network.cabal
@@ -86,7 +86,7 @@ library
     Network.Socket.Types
 
   build-depends:
-    base >= 4.7 && < 5,
+    base >= 4.9 && < 5,
     bytestring == 0.10.*,
     deepseq,
     directory
