diff --git a/ghc-hledger-lib.spec b/ghc-hledger-lib.spec
index 0f75918..baab79c 100644
--- a/ghc-hledger-lib.spec
+++ b/ghc-hledger-lib.spec
@@ -13,7 +13,6 @@ Summary:        Core data types, parsers and functionality for the hledger accou
 License:        GPLv3
 Url:            https://hackage.haskell.org/package/%{pkg_name}
 Source0:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz
-Patch0:         hledger-lib-mtl-compat.patch
 
 BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-rpm-macros
@@ -70,7 +69,7 @@ This package provides the Haskell %{pkg_name} library development files.
 
 %prep
 %setup -q -n %{pkg_name}-%{version}
-%patch0 -p1 -b .orig
+cabal-tweak-drop-dep mtl-compat
 
 
 %build
diff --git a/hledger-lib-mtl-compat.patch b/hledger-lib-mtl-compat.patch
deleted file mode 100644
index 6ce1dc5..0000000
--- a/hledger-lib-mtl-compat.patch
+++ /dev/null
@@ -1,18 +0,0 @@
---- hledger-lib-0.27.1/hledger-lib.cabal~	2016-05-28 02:34:13.000000000 +0900
-+++ hledger-lib-0.27.1/hledger-lib.cabal	2016-09-05 15:41:59.403085393 +0900
-@@ -63,7 +63,6 @@
-     , directory
-     , filepath
-     , mtl
--    , mtl-compat
-     , old-time
-     , parsec >= 3
-     , regex-tdfa
-@@ -141,7 +140,6 @@
-     , directory
-     , filepath
-     , mtl
--    , mtl-compat
-     , old-time
-     , parsec >= 3
-     , regex-tdfa