diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 581985c67..873f47767 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,38 +1,62 @@
 # Changelog
 
+## [v0.12.3](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.12.3) (2020-11-04)
+
+[Full Changelog](https://github.com/Materials-Consortia/optimade-python-tools/compare/v0.12.2...v0.12.3)
+
+**Fixed bugs:**
+
+- GITHUB\_TOKEN not useful for changelog action [\#587](https://github.com/Materials-Consortia/optimade-python-tools/issues/587)
+- Hill notation wrong \(still\) [\#585](https://github.com/Materials-Consortia/optimade-python-tools/issues/585)
+- Hill notation validation turning around C and H [\#581](https://github.com/Materials-Consortia/optimade-python-tools/issues/581)
+
+**Closed issues:**
+
+- Make structure "deformity" tests more robust [\#583](https://github.com/Materials-Consortia/optimade-python-tools/issues/583)
+- Incomplete output of optimade-validator [\#568](https://github.com/Materials-Consortia/optimade-python-tools/issues/568)
+
+**Merged pull requests:**
+
+- Use special release PAT for CHANGELOG generation action [\#588](https://github.com/Materials-Consortia/optimade-python-tools/pull/588) ([CasperWA](https://github.com/CasperWA))
+- Check for carbon in elements for Hill [\#586](https://github.com/Materials-Consortia/optimade-python-tools/pull/586) ([CasperWA](https://github.com/CasperWA))
+- Added better expected error messages to deformity tests [\#584](https://github.com/Materials-Consortia/optimade-python-tools/pull/584) ([ml-evs](https://github.com/ml-evs))
+- Fix Hill ordering validation [\#582](https://github.com/Materials-Consortia/optimade-python-tools/pull/582) ([CasperWA](https://github.com/CasperWA))
+- Bump mkdocs-material from 6.1.0 to 6.1.2 [\#580](https://github.com/Materials-Consortia/optimade-python-tools/pull/580) ([dependabot[bot]](https://github.com/apps/dependabot))
+- Moved CONFIG import so it does not get triggered when just importing mapper [\#569](https://github.com/Materials-Consortia/optimade-python-tools/pull/569) ([ml-evs](https://github.com/ml-evs))
+
 ## [v0.12.2](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.12.2) (2020-10-31)
 
 [Full Changelog](https://github.com/Materials-Consortia/optimade-python-tools/compare/v0.12.1...v0.12.2)
 
 **Implemented enhancements:**
 
-- Chemical formulae are not properly validated on model creation [\#546](https://github.com/Materials-Consortia/optimade-python-tools/issues/546)
 - Add convenience method for adding all required middleware [\#536](https://github.com/Materials-Consortia/optimade-python-tools/issues/536)
+- Add model validators and regexp for chemical formulae fields [\#547](https://github.com/Materials-Consortia/optimade-python-tools/pull/547) ([ml-evs](https://github.com/ml-evs))
+- Validator improvements [\#515](https://github.com/Materials-Consortia/optimade-python-tools/pull/515) ([ml-evs](https://github.com/ml-evs))
 
 **Fixed bugs:**
 
 - 'Chosen entry had no value for ...' when property is not requested [\#514](https://github.com/Materials-Consortia/optimade-python-tools/issues/514)
+- Fix Species validators and error messages [\#561](https://github.com/Materials-Consortia/optimade-python-tools/pull/561) ([ml-evs](https://github.com/ml-evs))
 
 **Closed issues:**
 
 - Chemical symbols D and T [\#570](https://github.com/Materials-Consortia/optimade-python-tools/issues/570)
 - Push back dependabot to monthly updates [\#567](https://github.com/Materials-Consortia/optimade-python-tools/issues/567)
 - Spurious validation errors in Structure-\>Species [\#559](https://github.com/Materials-Consortia/optimade-python-tools/issues/559)
+- Chemical formulae are not properly validated on model creation [\#546](https://github.com/Materials-Consortia/optimade-python-tools/issues/546)
 
 **Merged pull requests:**
 
 - Update dependencies [\#578](https://github.com/Materials-Consortia/optimade-python-tools/pull/578) ([CasperWA](https://github.com/CasperWA))
 - Bump CasperWA/push-protected from v1 to v2.1.0 [\#573](https://github.com/Materials-Consortia/optimade-python-tools/pull/573) ([dependabot[bot]](https://github.com/apps/dependabot))
 - Update deps [\#566](https://github.com/Materials-Consortia/optimade-python-tools/pull/566) ([ml-evs](https://github.com/ml-evs))
-- Fix Species validators and error messages [\#561](https://github.com/Materials-Consortia/optimade-python-tools/pull/561) ([ml-evs](https://github.com/ml-evs))
 - Improve handling of MongoDB ObjectID [\#557](https://github.com/Materials-Consortia/optimade-python-tools/pull/557) ([ml-evs](https://github.com/ml-evs))
 - Update deps [\#556](https://github.com/Materials-Consortia/optimade-python-tools/pull/556) ([ml-evs](https://github.com/ml-evs))
 - Updated dependencies [\#551](https://github.com/Materials-Consortia/optimade-python-tools/pull/551) ([ml-evs](https://github.com/ml-evs))
-- Add model validators and regexp for chemical formulae fields [\#547](https://github.com/Materials-Consortia/optimade-python-tools/pull/547) ([ml-evs](https://github.com/ml-evs))
 - Update dependencies - remove black as direct dependency [\#545](https://github.com/Materials-Consortia/optimade-python-tools/pull/545) ([CasperWA](https://github.com/CasperWA))
 - Added convenience variables for middleware and exception handlers [\#537](https://github.com/Materials-Consortia/optimade-python-tools/pull/537) ([ml-evs](https://github.com/ml-evs))
 - Update dependencies [\#531](https://github.com/Materials-Consortia/optimade-python-tools/pull/531) ([ml-evs](https://github.com/ml-evs))
-- Validator improvements [\#515](https://github.com/Materials-Consortia/optimade-python-tools/pull/515) ([ml-evs](https://github.com/ml-evs))
 
 ## [v0.12.1](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.12.1) (2020-09-24)
 
@@ -149,6 +173,7 @@
 - Fix incorrect placement of header=present in versions endpoint [\#419](https://github.com/Materials-Consortia/optimade-python-tools/pull/419) ([ml-evs](https://github.com/ml-evs))
 - Bump optimade-version.json to 1.0.0 [\#416](https://github.com/Materials-Consortia/optimade-python-tools/pull/416) ([ml-evs](https://github.com/ml-evs))
 - Use optimade-validator-action v2 [\#413](https://github.com/Materials-Consortia/optimade-python-tools/pull/413) ([CasperWA](https://github.com/CasperWA))
+- Bump providers from `a96d424` to `52027b1` [\#389](https://github.com/Materials-Consortia/optimade-python-tools/pull/389) ([dependabot[bot]](https://github.com/apps/dependabot))
 
 ## [v0.10.0](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.10.0) (2020-07-17)
 
@@ -177,7 +202,6 @@
 - Make the example for --as\_type more similar to a real use case [\#398](https://github.com/Materials-Consortia/optimade-python-tools/pull/398) ([merkys](https://github.com/merkys))
 - Fix some validator-specific crashes [\#395](https://github.com/Materials-Consortia/optimade-python-tools/pull/395) ([ml-evs](https://github.com/ml-evs))
 - Use pytest instead of unittest [\#390](https://github.com/Materials-Consortia/optimade-python-tools/pull/390) ([CasperWA](https://github.com/CasperWA))
-- Bump providers from `a96d424` to `52027b1` [\#389](https://github.com/Materials-Consortia/optimade-python-tools/pull/389) ([dependabot[bot]](https://github.com/apps/dependabot))
 - Update dependencies [\#388](https://github.com/Materials-Consortia/optimade-python-tools/pull/388) ([CasperWA](https://github.com/CasperWA))
 
 ## [v0.9.8](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.9.8) (2020-07-03)
@@ -548,6 +572,7 @@
 - Fix heroku badge [\#157](https://github.com/Materials-Consortia/optimade-python-tools/pull/157) ([ml-evs](https://github.com/ml-evs))
 - Move installation instructions [\#156](https://github.com/Materials-Consortia/optimade-python-tools/pull/156) ([ml-evs](https://github.com/ml-evs))
 - Update base URLs [\#155](https://github.com/Materials-Consortia/optimade-python-tools/pull/155) ([CasperWA](https://github.com/CasperWA))
+- Extend OpenAPI/spec description [\#151](https://github.com/Materials-Consortia/optimade-python-tools/pull/151) ([CasperWA](https://github.com/CasperWA))
 - Non Local Mongo [\#150](https://github.com/Materials-Consortia/optimade-python-tools/pull/150) ([shyamd](https://github.com/shyamd))
 
 ## [v0.3.3](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.3.3) (2020-01-24)
@@ -564,7 +589,6 @@
 
 **Merged pull requests:**
 
-- Extend OpenAPI/spec description [\#151](https://github.com/Materials-Consortia/optimade-python-tools/pull/151) ([CasperWA](https://github.com/CasperWA))
 - Updated lark-parser to 0.8.1 [\#149](https://github.com/Materials-Consortia/optimade-python-tools/pull/149) ([ml-evs](https://github.com/ml-evs))
 - Split eager and standard tests to avoid unnecessary badge of shame [\#148](https://github.com/Materials-Consortia/optimade-python-tools/pull/148) ([ml-evs](https://github.com/ml-evs))
 - Bump to v0.3.3 [\#147](https://github.com/Materials-Consortia/optimade-python-tools/pull/147) ([CasperWA](https://github.com/CasperWA))
diff --git a/docs/static/default_config.json b/docs/static/default_config.json
index e4327fa28..049aba98a 100644
--- a/docs/static/default_config.json
+++ b/docs/static/default_config.json
@@ -13,7 +13,7 @@
     "base_url": null,
     "implementation": {
         "name": "OPTIMADE Python Tools",
-        "version": "0.12.2",
+        "version": "0.12.3",
         "source_url": "https://github.com/Materials-Consortia/optimade-python-tools",
         "maintainer": {"email": "dev@optimade.org"}
     },
diff --git a/openapi/index_openapi.json b/openapi/index_openapi.json
index 81fb6016a..35f8fa3f4 100644
--- a/openapi/index_openapi.json
+++ b/openapi/index_openapi.json
@@ -2,7 +2,7 @@
   "openapi": "3.0.2",
   "info": {
     "title": "OPTIMADE API - Index meta-database",
-    "description": "The [Open Databases Integration for Materials Design (OPTIMADE) consortium](https://www.optimade.org/) aims to make materials databases interoperational by developing a common REST API.\nThis is the \"special\" index meta-database.\n\nThis specification is generated using [`optimade-python-tools`](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.12.2) v0.12.2.",
+    "description": "The [Open Databases Integration for Materials Design (OPTIMADE) consortium](https://www.optimade.org/) aims to make materials databases interoperational by developing a common REST API.\nThis is the \"special\" index meta-database.\n\nThis specification is generated using [`optimade-python-tools`](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.12.3) v0.12.3.",
     "version": "1.0.0"
   },
   "paths": {
diff --git a/openapi/openapi.json b/openapi/openapi.json
index 4ee2a4948..d0bcfc9d1 100644
--- a/openapi/openapi.json
+++ b/openapi/openapi.json
@@ -2,7 +2,7 @@
   "openapi": "3.0.2",
   "info": {
     "title": "OPTIMADE API",
-    "description": "The [Open Databases Integration for Materials Design (OPTIMADE) consortium](https://www.optimade.org/) aims to make materials databases interoperational by developing a common REST API.\n\nThis specification is generated using [`optimade-python-tools`](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.12.2) v0.12.2.",
+    "description": "The [Open Databases Integration for Materials Design (OPTIMADE) consortium](https://www.optimade.org/) aims to make materials databases interoperational by developing a common REST API.\n\nThis specification is generated using [`optimade-python-tools`](https://github.com/Materials-Consortia/optimade-python-tools/tree/v0.12.3) v0.12.3.",
     "version": "1.0.0"
   },
   "paths": {
diff --git a/optimade/__init__.py b/optimade/__init__.py
index fede77a0e..1c542edb1 100644
--- a/optimade/__init__.py
+++ b/optimade/__init__.py
@@ -1,2 +1,2 @@
-__version__ = "0.12.2"
+__version__ = "0.12.3"
 __api_version__ = "1.0.0"