diff --git a/stack.yaml b/stack.yaml
index 36cafda..a9c2189 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -3,7 +3,7 @@
 
 # Specifies the GHC version and set of packages available (e.g., lts-3.5,
 # nightly-2015-09-21, ghc-7.10.2)
-resolver: lts-5.1
+resolver: lts-5.5
 
 # Local packages, usually specified by relative directory name
 packages:
diff --git a/vervis.cabal b/vervis.cabal
index 8d57d61..2a7042a 100644
--- a/vervis.cabal
+++ b/vervis.cabal
@@ -90,56 +90,54 @@ library
   --                   , hourglass
   --                   , time-units
   --                   , unordered-containers >=0.2.5
-  build-depends:       aeson                         >= 0.6        && < 0.11
-                     , base                          >= 4          && < 5
+  build-depends:       aeson
+                     , base
                      , base64-bytestring
                      , blaze-html
-                     , bytestring                    >= 0.9        && < 0.11
+                     , bytestring
                      , case-insensitive
-                     , classy-prelude                >= 0.10.2
-                     , classy-prelude-conduit        >= 0.10.2
-                     --, classy-prelude-yesod          >= 0.10.2
-                     , conduit                       >= 1.0        && < 2.0
+                     , classy-prelude
+                     , classy-prelude-conduit
+                     , conduit
                      , containers
                      , data-default
-                     , directory                     >= 1.1        && < 1.3
+                     , directory
                      , dlist
                      , esqueleto
-                     , fast-logger                   >= 2.2        && < 2.5
+                     , fast-logger
                      , fgl
                      , file-embed
                      , filepath
                      , hashable
                      , hit
-                     , hjsmin                        >= 0.1        && < 0.2
+                     , hjsmin
                      , hourglass
-                     , http-conduit                  >= 2.1        && < 2.2
+                     , http-conduit
                      , http-types
-                     , monad-control                 >= 0.3        && < 1.1
-                     , monad-logger                  >= 0.3        && < 0.4
-                     , persistent                    >= 2.0        && < 2.3
-                     , persistent-postgresql         >= 2.1.1      && < 2.3
-                     , persistent-template           >= 2.0        && < 2.3
+                     , monad-control
+                     , monad-logger
+                     , persistent
+                     , persistent-postgresql
+                     , persistent-template
                      , safe
-                     , shakespeare                   >= 2.0        && < 2.1
+                     , shakespeare
                      , ssh
                      , template-haskell
-                     , text                          >= 0.11       && < 2.0
+                     , text
                      , time
                      , transformers
                      , unordered-containers
-                     --, vector
                      , wai
-                     , wai-extra                     >= 3.0        && < 3.1
-                     , wai-logger                    >= 2.2        && < 2.3
-                     , warp                          >= 3.0        && < 3.3
-                     , yaml                          >= 0.8        && < 0.9
-                     , yesod                         >= 1.4.1      && < 1.5
-                     , yesod-auth                    >= 1.4.0      && < 1.5
+                     , wai-extra
+                     , wai-logger
+                     , warp
+                     , yaml
+                     , yesod
+                     , yesod-auth
                      , yesod-auth-hashdb
-                     , yesod-core                    >= 1.4.17     && < 1.5
-                     , yesod-form                    >= 1.4.0      && < 1.5
-                     , yesod-static                  >= 1.4.0.3    && < 1.6
+                     , yesod-core
+                     , yesod-form
+                     , yesod-static
                      , yesod-persistent
   hs-source-dirs:      src
   default-language:    Haskell2010