diff --git a/snap-core.cabal b/snap-core.cabal
--- a/snap-core.cabal
+++ b/snap-core.cabal
@@ -1,5 +1,5 @@
 name:           snap-core
-version:        0.9.6.2
+version:        0.9.6.3
 synopsis:       Snap: A Haskell Web Framework (core interfaces and types)
 
 description:
@@ -129,7 +129,7 @@
 
 
   build-depends:
-    attoparsec                >= 0.10    && < 0.12,
+    attoparsec                >= 0.10    && < 0.13,
     attoparsec-enumerator     >= 0.3     && < 0.4,
     base                      >= 4       && < 5,
     blaze-builder             >= 0.2.1.4 && < 0.4,
@@ -144,7 +144,7 @@
     hashable                  (>= 1.1     && < 1.2) || (>= 1.2.1 && <1.3),
     HUnit                     >= 1.2     && < 2,
     MonadCatchIO-transformers >= 0.2.1   && < 0.4,
-    mtl                       >= 2.0     && < 2.2,
+    mtl                       >= 2.0     && < 2.3,
     random                    >= 1       && < 2,
     regex-posix               >= 0.95    && < 1,
     text                      >= 0.11    && < 1.2,
diff --git a/test/snap-core-testsuite.cabal b/test/snap-core-testsuite.cabal
--- a/test/snap-core-testsuite.cabal
+++ b/test/snap-core-testsuite.cabal
@@ -23,7 +23,7 @@
 
   build-depends:
     QuickCheck                 >= 2.3.0.2  && <3,
-    attoparsec                 >= 0.10     && <0.12,
+    attoparsec                 >= 0.10     && <0.13,
     attoparsec-enumerator      >= 0.3,
     base                       >= 4        && <5,
     blaze-builder              >= 0.2.1.4  && <0.4,