diff --git a/pkgs/servers/sql/postgresql/ext/pg_topn.nix b/pkgs/servers/sql/postgresql/ext/pg_topn.nix
index 0f8e2f61a6ec..03d571c03ba6 100644
--- a/pkgs/servers/sql/postgresql/ext/pg_topn.nix
+++ b/pkgs/servers/sql/postgresql/ext/pg_topn.nix
@@ -2,7 +2,7 @@
 
 stdenv.mkDerivation rec {
   pname = "pg_topn";
-  version = "2.3.0";
+  version = "2.3.1";
 
   buildInputs = [ postgresql ];
 
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
     owner  = "citusdata";
     repo   = "postgresql-topn";
     rev    = "refs/tags/v${version}";
-    sha256 = "05mjzm7rz5j7byzag23526hhsqsg4dsyxxsg8q9ray1rwxjbr392";
+    sha256 = "0ai07an90ywhk10q52hajgb33va5q76j7h8vj1r0rvq6dyii0wal";
   };
 
   installPhase = ''
@@ -24,6 +24,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Efficient querying of 'top values' for PostgreSQL";
     homepage    = "https://github.com/citusdata/postgresql-topn";
+    changelog   = "https://github.com/citusdata/postgresql-topn/blob/v${version}/CHANGELOG.md";
     maintainers = with maintainers; [ thoughtpolice ];
     platforms   = postgresql.meta.platforms;
     license     = licenses.agpl3;