diff --git a/attoparsec.cabal b/attoparsec.cabal
index 543be89..fdc3c44 100644
--- a/attoparsec.cabal
+++ b/attoparsec.cabal
@@ -1,6 +1,6 @@
 name:            attoparsec
 version:         0.13.2.2
-x-revision: 1
+x-revision: 2
 license:         BSD3
 license-file:    LICENSE
 category:        Text, Parsing
@@ -45,7 +45,7 @@ library
                  containers,
                  deepseq,
                  scientific >= 0.3.1 && < 0.4,
-                 transformers >= 0.4.1.0,
+                 transformers >= 0.2 && (< 0.4 || >= 0.4.1.0) && < 0.6,
                  text >= 1.1.1.3
   if impl(ghc < 7.4)
     build-depends:
@@ -134,7 +134,7 @@ test-suite tests
     tasty >= 0.11,
     tasty-quickcheck >= 0.8,
     text,
-    transformers >= 0.4.1.0,
+    transformers >= 0.2 && (< 0.4 || >= 0.4.1.0) && < 0.6,
     vector
 
   if !impl(ghc >= 8.0)
@@ -179,7 +179,7 @@ benchmark benchmarks
     parsec >= 3.1.2,
     scientific,
     text >= 1.1.1.0,
-    transformers >= 0.4.1.0,
+    transformers >= 0.2 && (< 0.4 || >= 0.4.1.0) && < 0.6,
     unordered-containers,
     vector
 
diff --git a/ghc-attoparsec.spec b/ghc-attoparsec.spec
index 07823bf..16a3290 100644
--- a/ghc-attoparsec.spec
+++ b/ghc-attoparsec.spec
@@ -26,7 +26,7 @@ License:        BSD-3-Clause
 Group:          Development/Libraries/Haskell
 URL:            https://hackage.haskell.org/package/%{pkg_name}
 Source0:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz
-Source1:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/revision/1.cabal#/%{pkg_name}.cabal
+Source1:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/revision/2.cabal#/%{pkg_name}.cabal
 BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-array-devel
 BuildRequires:  ghc-bytestring-devel