diff --git a/fix-imports.cabal b/fix-imports.cabal
--- a/fix-imports.cabal
+++ b/fix-imports.cabal
@@ -1,5 +1,5 @@
 name: fix-imports
-version: 1.0.2
+version: 1.0.3
 cabal-version: >= 1.6
 build-type: Simple
 synopsis: Program to manage the imports of a haskell module
@@ -56,6 +56,7 @@
 executable fix-imports
     main-is: Main.hs
     hs-source-dirs: src
-    build-depends: base >= 3 && < 5, containers, directory, filepath, process,
-        haskell-src-exts >= 1.13.2, uniplate, split, cpphs, text
+    build-depends: base >= 3 && < 5, containers, directory, filepath, process
+        , haskell-src-exts >= 1.14.0 && < 1.15
+        , uniplate, split, cpphs, text
     ghc-options: -Wall -fno-warn-name-shadowing
diff --git a/src/Config.hs b/src/Config.hs
--- a/src/Config.hs
+++ b/src/Config.hs
@@ -156,8 +156,13 @@
     above ++ importLine ++ (if null right then "" else ' ' : right)
     where
     above = concat [cmt ++ "\n" | Types.Comment Types.CmtAbove cmt <- cmts]
-    importLine = Haskell.prettyPrint imp
+    importLine = Haskell.prettyPrintStyleMode style mode imp
     right = Util.join "\n" [cmt | Types.Comment Types.CmtRight cmt <- cmts]
+    style = Haskell.style
+        { Haskell.lineLength = 80
+        , Haskell.ribbonsPerLine = 1
+        }
+    mode = Haskell.defaultMode
 
 {-
 -- t0 = map localPrio imports -- formatGroups priorities (map mkImport imports)
diff --git a/src/FixImports.hs b/src/FixImports.hs
--- a/src/FixImports.hs
+++ b/src/FixImports.hs
@@ -143,7 +143,12 @@
     parse = Haskell.parseFileContentsWithComments $
         Haskell.defaultParseMode
             { Haskell.parseFilename = modulePath
-            , Haskell.extensions = Extension.haskell2010
+            , Haskell.extensions = map Extension.EnableExtension $
+                Extension.toExtensionList Extension.Haskell2010 []
+                -- GHC has this extension enabled by default, and it's easy
+                -- to wind up with code that relies on it:
+                -- http://www.haskell.org/ghc/docs/7.6.3/html/users_guide/bugs-and-infelicities.html#infelicities-syntax
+                ++ [Extension.NondecreasingIndentation]
             -- The meaning of Nothing is undocumented, but I think it means
             -- to not check for fixity ambiguity at all, which is what I want.
             , Haskell.fixities = Nothing