diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,15 @@
 Changelog
 =========
 
+Version 0.1.2.1
+---------------
+
+*Apr 21, 2018*
+
+<https://github.com/mstksg/one-liner-instances/releases/tag/v0.1.2.1>
+
+*   Forgot to export *System.Random.OneLiner*!
+
 Version 0.1.2.0
 ---------------
 
diff --git a/one-liner-instances.cabal b/one-liner-instances.cabal
--- a/one-liner-instances.cabal
+++ b/one-liner-instances.cabal
@@ -2,10 +2,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: a1781911abc3fd4d6382fa43927d49aba4d1e07d876833a215fc311dec1da55b
+-- hash: 6acb459b36dc35bbc749809acb02ea8b942833b8ae0a465908c8ddfc21ac7dca
 
 name:           one-liner-instances
-version:        0.1.2.0
+version:        0.1.2.1
 synopsis:       Generics-based implementations for common typeclasses
 description:    Provides generics-based implementations for common typeclasses using
                 Generics.
@@ -31,19 +31,19 @@
   location: https://github.com/mstksg/one-liner-instances
 
 library
-  hs-source-dirs:
-      src
-  ghc-options: -Wall
-  build-depends:
-      base >=4.7 && <5
-    , one-liner >=0.9
-    , random
   exposed-modules:
       Data.Bounded.OneLiner
       Data.Monoid.OneLiner
       Data.Ord.OneLiner
       Numeric.OneLiner
-  other-modules:
       System.Random.OneLiner
+  other-modules:
       Paths_one_liner_instances
+  hs-source-dirs:
+      src
+  ghc-options: -Wall
+  build-depends:
+      base >=4.7 && <5
+    , one-liner >=0.9
+    , random
   default-language: Haskell2010