diff --git a/hpaco-lib.cabal b/hpaco-lib.cabal
--- a/hpaco-lib.cabal
+++ b/hpaco-lib.cabal
@@ -1,5 +1,5 @@
 name:                hpaco-lib
-version:             0.25.2.0
+version:             0.26.0.0
 synopsis:            Modular template compiler library
 description:         Template compiler library, compiles template code into
                      PHP or Javascript, or interprets it directly.
@@ -8,7 +8,7 @@
 license-file:        LICENSE
 author:              Tobias Dammers
 maintainer:          tdammers@gmail.com
--- copyright:           
+-- copyright:
 category:            Development
 build-type:          Simple
 cabal-version:       >=1.8
@@ -43,17 +43,17 @@
                  , Text.HPaco.AST.Expression
                  , Text.HPaco.Writer
                  , Text.HPaco.Reader
-  -- other-modules:       
+  -- other-modules:
   build-depends:       base == 4.*
-               ,       data-variant >= 0.1
-               ,       bytestring == 0.9.*
-               ,       parsec == 3.*
-               ,       mtl == 2.1.*
+               ,       data-variant >= 0.1 && < 1.0
+               ,       bytestring >= 0.9 && < 1.0
+               ,       parsec >= 3 && < 4
+               ,       mtl >= 2.1 && < 3
                ,       containers >= 0.2 && < 1.0
-               ,       transformers == 0.3.*
-               ,       strict == 0.3.*
+               ,       transformers >= 0.3 && < 1.0
+               ,       strict >= 0.3 && < 1.0
                ,       filepath >= 1.1 && < 1.4
                ,       split >= 0.1 && < 0.3
                ,       safe >= 0.3.3 && < 1.0
-               ,       file-embed == 0.0.4.*
-               ,       aeson == 0.6.*
+               ,       file-embed >= 0.0.4 && < 1.0
+               ,       aeson >= 0.6 && < 1.0