diff --git a/keera-hails-reactive-cbmvar.cabal b/keera-hails-reactive-cbmvar.cabal
--- a/keera-hails-reactive-cbmvar.cabal
+++ b/keera-hails-reactive-cbmvar.cabal
@@ -6,7 +6,7 @@
 build-type:    Simple
 
 name:          keera-hails-reactive-cbmvar
-version:       0.7.0
+version:       0.8.0
 author:        Sasha Pavlenko
 maintainer:    support@keera.co.uk
 homepage:      https://keera.co.uk/
@@ -45,6 +45,7 @@
   build-depends:
       base >= 4 && < 5
     , lens
+
     , keera-hails-reactivevalues
     , keera-callbacks
 
@@ -75,8 +76,8 @@
     buildable: False
   else
     build-depends:
-        base
-      , hlint                >= 1.7
+        base  >= 4   && < 5
+      , hlint >= 1.7
 
 -- Verify that the code is thoroughly documented
 test-suite haddock-coverage
@@ -100,7 +101,7 @@
     buildable: False
   else
     build-depends:
-        base                 >= 4        && < 5
+        base        >= 4 && < 5
       , directory
       , filepath
       , process