diff --git a/dhall/src/Dhall/Marshal/Decode.hs b/dhall/src/Dhall/Marshal/Decode.hs
index cf6b65283..ab72bc998 100644
--- a/dhall/src/Dhall/Marshal/Decode.hs
+++ b/dhall/src/Dhall/Marshal/Decode.hs
@@ -146,7 +146,6 @@ import Data.Functor.Contravariant
     , Predicate (..)
     )
 import Data.Hashable                    (Hashable)
-import Data.Int                         (Int16, Int32, Int64, Int8)
 import Data.List.NonEmpty               (NonEmpty (..))
 import Data.Typeable                    (Proxy (..), Typeable)
 import Dhall.Parser                     (Src (..))
diff --git a/dhall/src/Dhall/Marshal/Encode.hs b/dhall/src/Dhall/Marshal/Encode.hs
index 07f303c4e..28246dce6 100644
--- a/dhall/src/Dhall/Marshal/Encode.hs
+++ b/dhall/src/Dhall/Marshal/Encode.hs
@@ -206,6 +206,34 @@ instance ToDhall Int where
 
         declared = Integer
 
+instance ToDhall Int8 where
+    injectWith _ = Encoder {..}
+      where
+        embed = IntegerLit . toInteger
+
+        declared = Integer
+
+instance ToDhall Int16 where
+    injectWith _ = Encoder {..}
+      where
+        embed = IntegerLit . toInteger
+
+        declared = Integer
+
+instance ToDhall Int32 where
+    injectWith _ = Encoder {..}
+      where
+        embed = IntegerLit . toInteger
+
+        declared = Integer
+
+instance ToDhall Int64 where
+    injectWith _ = Encoder {..}
+      where
+        embed = IntegerLit . toInteger
+
+        declared = Integer
+
 {-| Encode a 'Word' to a Dhall @Natural@.
 
 >>> embed inject (12 :: Word)
diff --git a/dhall/src/Dhall/Marshal/Internal.hs b/dhall/src/Dhall/Marshal/Internal.hs
index e345ab8b4..b100f0fdc 100644
--- a/dhall/src/Dhall/Marshal/Internal.hs
+++ b/dhall/src/Dhall/Marshal/Internal.hs
@@ -27,6 +27,10 @@ module Dhall.Marshal.Internal
     -- * Re-exports
     , Fix(..)
     , HashMap
+    , Int8
+    , Int16
+    , Int32
+    , Int64
     , Map
     , Natural
     , Scientific
@@ -44,6 +48,7 @@ module Dhall.Marshal.Internal
 import Control.Monad.Trans.State.Strict
 import Data.Fix                         (Fix (..))
 import Data.HashMap.Strict              (HashMap)
+import Data.Int                         (Int16, Int32, Int64, Int8)
 import Data.Map                         (Map)
 import Data.Scientific                  (Scientific)
 import Data.Sequence                    (Seq)
diff --git a/stack.yaml b/stack.yaml
index 395861212..4381d124f 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-18.0
+resolver: lts-18.18
 packages:
   - dhall
   - dhall-bash