diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+1.5.1
+
+* Increase upper bound on `vector` and `optparse-generic`
+
 1.5.0
 
 * BREAKING CHANGE: Add list concatenation operator: `(#)`
diff --git a/dhall.cabal b/dhall.cabal
--- a/dhall.cabal
+++ b/dhall.cabal
@@ -1,5 +1,5 @@
 Name: dhall
-Version: 1.5.0
+Version: 1.5.1
 Cabal-Version: >=1.8.0.2
 Build-Type: Simple
 Tested-With: GHC == 7.10.2, GHC == 8.0.1
@@ -123,7 +123,7 @@
     Build-Depends:
         base             >= 4        && < 5  ,
         dhall                                ,
-        optparse-generic >= 1.1.1    && < 1.2,
+        optparse-generic >= 1.1.1    && < 1.3,
         trifecta         >= 1.6      && < 1.8,
         text             >= 0.11.1.0 && < 1.3
     GHC-Options: -Wall
@@ -146,4 +146,4 @@
         tasty              >= 0.11.2   && < 0.12,
         tasty-hunit        >= 0.9.2    && < 0.10,
         text               >= 0.11.1.0 && < 1.3 ,
-        vector             >= 0.11.0.0 && < 0.12
+        vector             >= 0.11.0.0 && < 0.13
diff --git a/src/Dhall.hs b/src/Dhall.hs
--- a/src/Dhall.hs
+++ b/src/Dhall.hs
@@ -19,6 +19,7 @@
 
     -- * Types
     , Type(..)
+    , InputType(..)
     , Interpret(..)
     , InvalidType(..)
     , auto