dependency manipulation

trifecta.cabal

@@ -59,16 +59,15 @@ library
     fingertree           >= 0.0.1   && < 0.1,
     ghc-prim,
     hashable             >= 1.2     && < 1.3,
-    lens                 >= 3.8,
+    lens                 >= 3.8.2   && < 4,
     mtl                  >= 2.0.1   && < 2.2,
     parsers              >= 0.5     && < 1,
     reducers             == 3.*,
-    semigroups           >= 0.8.3.1,
+    semigroups           >= 0.8.3.1 && < 1,
     transformers         >= 0.2     && < 0.4,
     unordered-containers >= 0.2.1   && < 0.3,
     utf8-string          >= 0.3.6   && < 0.4
 
-    --keys                 == 3.*,
 test-suite doctests
   type:    exitcode-stdio-1.0
   main-is: doctests.hs