diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Dotenv 0.3.0.3
+
+* Allow optparse-applicative 0.13
+
 ## Dotenv 0.3.0.1
 
 * Remove unnecessary package dependencies.
diff --git a/app/Main.hs b/app/Main.hs
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -1,4 +1,10 @@
+{-# LANGUAGE CPP #-}
+
 module Main where
+
+#if MIN_VERSION_optparse_applicative(0,13,0)
+import Data.Monoid ((<>))
+#endif
 
 import Options.Applicative
 
diff --git a/dotenv.cabal b/dotenv.cabal
--- a/dotenv.cabal
+++ b/dotenv.cabal
@@ -1,5 +1,5 @@
 name:                dotenv
-version:             0.3.0.2
+version:             0.3.0.3
 synopsis:            Loads environment variables from dotenv files
 homepage:            https://github.com/stackbuilders/dotenv-hs
 description:
@@ -49,7 +49,7 @@
   build-depends:         base >=4.5 && <5.0
                        , base-compat >= 0.4
                        , dotenv >= 0.3.0.2
-                       , optparse-applicative >=0.11 && < 0.13
+                       , optparse-applicative >=0.11 && < 0.14
                        , megaparsec >= 5.0 && < 6.0
                        , process
                        , text