diff --git a/.gitignore b/.gitignore
index b84643c..3cccd0d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,3 +40,4 @@
 /MCE-1.828.tar.gz
 /MCE-1.829.tar.gz
 /MCE-1.830.tar.gz
+/MCE-1.831.tar.gz
diff --git a/perl-MCE.spec b/perl-MCE.spec
index 38139f9..8b093ca 100644
--- a/perl-MCE.spec
+++ b/perl-MCE.spec
@@ -1,5 +1,5 @@
 Name:           perl-MCE
-Version:        1.830
+Version:        1.831
 Release:        1%{?dist}
 Summary:        Many-core Engine for Perl providing parallel processing capabilities
 License:        GPL+ or Artistic
@@ -153,6 +153,13 @@ make test
 %{_bindir}/mce_zfgrep
 
 %changelog
+* Mon Oct  9 2017 Paul Howarth <paul@city-fan.org> - 1.831-1
+- Update to 1.831
+  - Added STFL (Terminal UI) to list for enabling posix_exit
+    (see http://www.perlmonks.org/?node_id=1200923)
+  - Math::Prime::Util random numbers now unique between MCE workers
+    (see http://www.perlmonks.org/?node_id=1200960)
+
 * Wed Sep 13 2017 Paul Howarth <paul@city-fan.org> - 1.830-1
 - Update to 1.830
   Bug Fixes
diff --git a/sources b/sources
index 2499a87..39b1061 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (MCE-1.830.tar.gz) = c47f21a239103df7fc6f0c4b1357525d32f8efefd35a556443527c2a119b5df35ab1d867801a3539ba7081cb49252371f5b80a5853a3e308eaa4569298efff12
+SHA512 (MCE-1.831.tar.gz) = cca01463bed30b2c028318d92269de59f7c48d86c64b7a2bb7e07a9a668217f10ae70d4e6ac05e873d7305b572840833bdce8585dfd3975a56c95b531ce4cc0e