diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,4 +1,9 @@
 
+0.2
+---
+
+* Relaxed base upper bound to < 5.
+
 0.1
 ---
 
diff --git a/aspell-pipe.cabal b/aspell-pipe.cabal
--- a/aspell-pipe.cabal
+++ b/aspell-pipe.cabal
@@ -1,5 +1,5 @@
 name:                aspell-pipe
-version:             0.1
+version:             0.2
 synopsis:            Pipe-based interface to the Aspell program
 description:         A pipe-based interface to the Aspell program (no
                      dynamic linking required).
@@ -25,6 +25,6 @@
 
   hs-source-dirs:      src
   default-language:    Haskell2010
-  build-depends:       base >=4.8 && <4.9,
+  build-depends:       base >=4.8 && <5,
                        process >= 1.6,
                        text