bump version to 2.3.1
diff --git a/rel/reltool.config b/rel/reltool.config
index 858e935..1c4355f 100644
--- a/rel/reltool.config
+++ b/rel/reltool.config
@@ -12,7 +12,7 @@
 
 {sys, [
     {lib_dirs, ["../src"]},
-    {rel, "couchdb", "2.3.0", [
+    {rel, "couchdb", "2.3.1", [
         %% stdlib
         asn1,
         compiler,
diff --git a/version.mk b/version.mk
index a93c9b1..410523d 100644
--- a/version.mk
+++ b/version.mk
@@ -1,3 +1,3 @@
 vsn_major=2
 vsn_minor=3
-vsn_patch=0
+vsn_patch=1