diff --git a/dbm.cabal b/dbm.cabal
--- a/dbm.cabal
+++ b/dbm.cabal
@@ -1,5 +1,5 @@
 name:                dbm
-version:             0.1.0.1
+version:             0.1.1.0
 synopsis:            A *simple* database migration tool.
 homepage:            https://github.com/relrod/dbm
 license:             BSD3
@@ -19,7 +19,7 @@
   build-depends:       base >= 4 && < 5
                      , directory
                      , ini
-                     , optparse-applicative
+                     , optparse-applicative >= 0.12 && < 0.14
                      , sqlite-simple
                      , text
                      , time
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -5,6 +5,7 @@
 import Data.Ini
 import Data.List (elem, isSuffixOf)
 import Data.Maybe (fromMaybe)
+import Data.Monoid ((<>))
 import qualified Data.Text as T
 import qualified Data.Text.IO as T
 import System.Directory