diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+# Version 0.1.0.1
+
+* Relax upper bound on `singletons` dependency.
+
+
 # Version 0.1
 
 * Initial release.
diff --git a/exinst-bytes.cabal b/exinst-bytes.cabal
--- a/exinst-bytes.cabal
+++ b/exinst-bytes.cabal
@@ -1,5 +1,5 @@
 name:                exinst-bytes
-version:             0.1
+version:             0.1.0.1
 author:              Renzo Carbonara
 maintainer:          renzoλcarbonara.com.ar
 copyright:           Renzo Carbonara 2015
@@ -23,6 +23,6 @@
     , bytes >=0.15 && <0.16
     , constraints >=0.4 && <0.5
     , exinst >=0.1 && <0.2
-    , singletons >=1.1 && <1.2
+    , singletons >=1.1 && <2.1
   ghcjs-options: -Wall -O3
   ghc-options: -Wall -O2