diff --git a/twentefp-number.cabal b/twentefp-number.cabal
--- a/twentefp-number.cabal
+++ b/twentefp-number.cabal
@@ -1,5 +1,5 @@
 name:                twentefp-number
-version:             0.1.0.0
+version:             0.1.0.1
 synopsis:            Lab Assignments Environment at Univeriteit Twente
 description:         Lab Assignments Environment at Univeriteit Twente
 license:             BSD3
@@ -14,6 +14,6 @@
   exposed-modules:     FPPrac
   other-modules:       FPPrac.Prelude, 
                        FPPrac.Prelude.Number
-  build-depends:       base ==4.6.*, 
-                       parsec ==3.1.*
+  build-depends:       base >=4.6.0.1 && < 5, 
+                       parsec >=3.1.3
   hs-source-dirs:      src