diff --git a/Hledger/Interest.hs b/Hledger/Interest.hs
--- a/Hledger/Interest.hs
+++ b/Hledger/Interest.hs
@@ -9,10 +9,12 @@
   )
   where
 
+import Hledger.Data
 import Hledger.Interest.DayCountConvention
 import Hledger.Interest.Rate
-import Hledger.Data
 import Control.Monad.RWS
+import Data.Maybe
+import Data.Time.Calendar
 import Data.Time.Calendar.OrdinalDate
 import Numeric
 
diff --git a/Main.hs b/Main.hs
--- a/Main.hs
+++ b/Main.hs
@@ -4,6 +4,10 @@
 import Hledger.Read
 
 import Control.Exception ( bracket )
+import Control.Monad
+import Data.List
+import Data.Maybe
+import Data.Ord
 import Distribution.Text ( display )
 import System.Console.GetOpt
 import System.Environment
diff --git a/hledger-interest.cabal b/hledger-interest.cabal
--- a/hledger-interest.cabal
+++ b/hledger-interest.cabal
@@ -1,5 +1,5 @@
 Name:                   hledger-interest
-Version:                1.2
+Version:                1.3
 Synopsis:               computes interest for a given account
 License:                BSD3
 License-file:           LICENSE
@@ -112,7 +112,7 @@
 
 Executable hledger-interest
   Main-is:              Main.hs
-  Build-depends:        base >= 3 && < 5, hledger-lib == 0.14, time, mtl, Cabal
+  Build-depends:        base >= 3 && < 5, hledger-lib >= 0.14, time, mtl, Cabal
   other-modules:        Hledger.Interest
                         Hledger.Interest.DayCountConvention
                         Hledger.Interest.Rate