diff --git a/CHANGES.md b/CHANGES.md
index e5d2096..fc5303d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,13 @@
 # Microdot change log
 
+**Release 1.3.1** - 2023-05-21
+
+- Support negative numbers for int path components [#137](https://github.com/miguelgrinberg/microdot/issues/137) ([commit](https://github.com/miguelgrinberg/microdot/commit/a0dd7c8ab6d681932324e56ed101aba861a105a0))
+- Use a more conservative default for socket timeout [#130](https://github.com/miguelgrinberg/microdot/issues/130) ([commit](https://github.com/miguelgrinberg/microdot/commit/239cf4ff37268a7e2467b93be44fe9f91cee8aee))
+- More robust check for socket timeout error code [#106](https://github.com/miguelgrinberg/microdot/issues/106) ([commit](https://github.com/miguelgrinberg/microdot/commit/efec9f14be7b6f3451e4d1d0fe7e528ce6ca74dc))
+- WebSocket error when handling PING packet [#129](https://github.com/miguelgrinberg/microdot/issues/129) ([commit](https://github.com/miguelgrinberg/microdot/commit/87cd098f66e24bed6bbad29b1490a129e355bbb3))
+- Explicitly set UTF-8 encoding for HTML files in examples [#132](https://github.com/miguelgrinberg/microdot/issues/132) ([commit](https://github.com/miguelgrinberg/microdot/commit/f81de6d9582f4905b9c2735d3c639b92d7e77994))
+
 **Release 1.3.0** - 2023-04-08
 
 - Cross-Origin Resource Sharing (CORS) extension [#45](https://github.com/miguelgrinberg/microdot/issues/45) ([commit](https://github.com/miguelgrinberg/microdot/commit/67798f7dbffb30018ab4b62a9aaa297f63bc9e64))
diff --git a/setup.cfg b/setup.cfg
index 39db57e..c65af3e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = microdot
-version = 1.3.1.dev0
+version = 1.3.1
 author = Miguel Grinberg
 author_email = miguel.grinberg@gmail.com
 description = The impossibly small web framework for MicroPython