diff --git a/Doxygen b/Doxygen
index b833fd2b5..b61a52ff2 100644
--- a/Doxygen
+++ b/Doxygen
@@ -38,7 +38,7 @@ PROJECT_NAME           = "ESPHome"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 2021.12.2
+PROJECT_NUMBER         = 2021.12.3
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/Makefile b/Makefile
index b73021e89..ab11fcd8c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 ESPHOME_PATH = ../esphome
-ESPHOME_REF = 2021.12.2
+ESPHOME_REF = 2021.12.3
 
 .PHONY: html html-strict cleanhtml deploy help webserver Makefile netlify netlify-api api netlify-dependencies svg2png copy-svg2png minify
 
diff --git a/_static/version b/_static/version
index 77c1f248e..aa76013e5 100644
--- a/_static/version
+++ b/_static/version
@@ -1 +1 @@
-2021.12.2
\ No newline at end of file
+2021.12.3
\ No newline at end of file
diff --git a/changelog/2021.12.0.rst b/changelog/2021.12.0.rst
index 597f68858..3a3a03f8b 100644
--- a/changelog/2021.12.0.rst
+++ b/changelog/2021.12.0.rst
@@ -95,6 +95,14 @@ Release 2021.12.2 - December 21
 - Don't disable idle task WDT when it's not enabled :esphomepr:`2856` by :ghuser:`oxan`
 - Fix MQTT button press action :esphomepr:`2917` by :ghuser:`oxan`
 
+Release 2021.12.3 - December 30
+-------------------------------
+
+- Require arduino in webserver for better validation :esphomepr:`2941` by :ghuser:`jesserockz`
+- Only allow internal pins for dht sensor :esphomepr:`2940` by :ghuser:`jesserockz`
+- Workaround installing as editable package not working :esphomepr:`2936` by :ghuser:`jesserockz`
+- Remove -e for hassio images :esphomepr:`2964` by :ghuser:`jesserockz`
+
 Full list of changes
 --------------------
 
diff --git a/conf.py b/conf.py
index 1fafa3940..2172c61a5 100644
--- a/conf.py
+++ b/conf.py
@@ -69,7 +69,7 @@ author = "Otto Winter"
 # The short X.Y version.
 version = "2021.12"
 # The full version, including alpha/beta/rc tags.
-release = "2021.12.2"
+release = "2021.12.3"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/guides/supporters.rst b/guides/supporters.rst
index 00fdc5d6c..d899badb6 100644
--- a/guides/supporters.rst
+++ b/guides/supporters.rst
@@ -281,6 +281,7 @@ Contributors
 - `gordon-zhao (@gordon-zhao) <https://github.com/gordon-zhao>`__
 - `Gustavo Ambrozio (@gpambrozio) <https://github.com/gpambrozio>`__
 - `Antoine GRÉA (@grea09) <https://github.com/grea09>`__
+- `George (@grob6000) <https://github.com/grob6000>`__
 - `Andrea (@Guglio95) <https://github.com/Guglio95>`__
 - `Guillaume DELVIT (@guiguid) <https://github.com/guiguid>`__
 - `guptamp (@guptamp) <https://github.com/guptamp>`__
@@ -298,6 +299,7 @@ Contributors
 - `Jimmy Hedman (@HeMan) <https://github.com/HeMan>`__
 - `HepoH3 (@HepoH3) <https://github.com/HepoH3>`__
 - `Hermann Kraus (@herm) <https://github.com/herm>`__
+- `Tom Cassady (@heytcass) <https://github.com/heytcass>`__
 - `Hamish Moffatt (@hmoffatt) <https://github.com/hmoffatt>`__
 - `MoA (@honomoa) <https://github.com/honomoa>`__
 - `Hopperpop (@Hopperpop) <https://github.com/Hopperpop>`__
@@ -357,6 +359,7 @@ Contributors
 - `Jonathan Treffler (@JonathanTreffler) <https://github.com/JonathanTreffler>`__
 - `JonnyaiR (@jonnyair) <https://github.com/jonnyair>`__
 - `Joppy (@JoppyFurr) <https://github.com/JoppyFurr>`__
+- `Joscha Wagner (@jowgn) <https://github.com/jowgn>`__
 - `jsuanet (@jsuanet) <https://github.com/jsuanet>`__
 - `junnikokuki (@junnikokuki) <https://github.com/junnikokuki>`__
 - `Justahobby01 (@Justahobby01) <https://github.com/Justahobby01>`__
@@ -393,7 +396,6 @@ Contributors
 - `Karl Q. (@kquinsland) <https://github.com/kquinsland>`__
 - `krahabb (@krahabb) <https://github.com/krahabb>`__
 - `Kodey Converse (@krconv) <https://github.com/krconv>`__
-- `krikk (@krikk) <https://github.com/krikk>`__
 - `KristopherMackowiak (@KristopherMackowiak) <https://github.com/KristopherMackowiak>`__
 - `kroimon (@kroimon) <https://github.com/kroimon>`__
 - `krunkel (@krunkel) <https://github.com/krunkel>`__
@@ -410,6 +412,7 @@ Contributors
 - `lcavalli (@lcavalli) <https://github.com/lcavalli>`__
 - `Benny de Leeuw (@leeuwte) <https://github.com/leeuwte>`__
 - `Riku Lindblad (@lepinkainen) <https://github.com/lepinkainen>`__
+- `Lerosen (@Lerosen) <https://github.com/Lerosen>`__
 - `Leon Loopik (@Lewn) <https://github.com/Lewn>`__
 - `Luca Gugelmann (@lgugelmann) <https://github.com/lgugelmann>`__
 - `Juraj Liso (@LiJu09) <https://github.com/LiJu09>`__
@@ -619,7 +622,6 @@ Contributors
 - `Rubén G. (@rubengargar) <https://github.com/rubengargar>`__
 - `@RubenKelevra (@RubenKelevra) <https://github.com/RubenKelevra>`__
 - `RubyBailey (@RubyBailey) <https://github.com/RubyBailey>`__
-- `Roberto Wagner (@rwagnervm) <https://github.com/rwagnervm>`__
 - `rweather (@rweather) <https://github.com/rweather>`__
 - `ryanalden (@ryanalden) <https://github.com/ryanalden>`__
 - `Ryan Nazaretian (@ryannazaretian) <https://github.com/ryannazaretian>`__
@@ -766,4 +768,4 @@ Contributors
 - `ZTX18 (@ZTX18) <https://github.com/ZTX18>`__
 - `Christian Zufferey (@zuzu59) <https://github.com/zuzu59>`__
 
-*This page was last updated December 21, 2021.*
+*This page was last updated December 30, 2021.*