diff --git a/Readme.md b/Readme.md
index 7e54ee1baeaf313b8db04f44ed992be822ac6057..25d9232e967be8e3b496100bd3e1df5839624e9f 100644
--- a/Readme.md
+++ b/Readme.md
@@ -1,4 +1,4 @@
-# STACK 4.8.2
+# STACK 4.8.3
 
 STACK is an assessment system for mathematics, science and related disciplines.  STACK is a question type for the Moodle learning management system, and also the ILIAS learning management system.  STACK has an API for stand-alone integration into other 3rd party systems.
 
diff --git a/api/config_sample.txt b/api/config_sample.txt
index c85e4fc901838f6b5e6c47acbf2812a451293768..6c28c29a3604b99691de3783f22a938c0ed9f648 100644
--- a/api/config_sample.txt
+++ b/api/config_sample.txt
@@ -91,8 +91,8 @@ $CFG->inputmustverify = 1;
 $CFG->inputshowvalidation = 1;
 
 // These should match the version of goemaxima in docker-compose.
-$CFG->stackmaximaversion = "2025122100";
-$CFG->version = "2025122100";
+$CFG->stackmaximaversion = "2025012100";
+$CFG->version = "2025012100";
 
 // Do not change this setting.
 $CFG->mathsdisplay = 'api';
diff --git a/api/docker/docker-compose.dev.yml b/api/docker/docker-compose.dev.yml
index 5c0e7d93d058e5e968a4c5b8fdb4f99f0b500584..35b5806461254fe36f7aa433bb56cb464acdcfcb 100644
--- a/api/docker/docker-compose.dev.yml
+++ b/api/docker/docker-compose.dev.yml
@@ -1,7 +1,7 @@
 version: "4.0"
 services:
   maxima:
-    image: mathinstitut/goemaxima:2025122100-latest
+    image: mathinstitut/goemaxima:2025012100-latest
     tmpfs:
       - "/tmp"
     restart: unless-stopped
diff --git a/api/docker/docker-compose.yml b/api/docker/docker-compose.yml
index 0dec0ea0891fb8b8aa16a1287c8c7f71cea4c65b..0997fdb43220bd6d0231a62777254652b7943c7d 100644
--- a/api/docker/docker-compose.yml
+++ b/api/docker/docker-compose.yml
@@ -1,7 +1,7 @@
 version: "4.0"
 services:
   maxima:
-    image: mathinstitut/goemaxima:2025122100-latest
+    image: mathinstitut/goemaxima:2025012100-latest
     tmpfs:
       - "/tmp"
     restart: unless-stopped
@@ -15,7 +15,7 @@ services:
     read_only: true
   stack:
     # Location of published STACK API image goes here.
-    image: stackmaths/stackapi:2025122100-latest
+    image: stackmaths/stackapi:2025012100-latest
     restart: unless-stopped
     ports:
       - '3080:80'
diff --git a/doc/en/Developer/Development_history.md b/doc/en/Developer/Development_history.md
index 25ec4a327461e0c0c6b4ddebdc8d604044848fbb..5362dfe08b977014c10aefccec3af1d205991b0c 100644
--- a/doc/en/Developer/Development_history.md
+++ b/doc/en/Developer/Development_history.md
@@ -2,7 +2,7 @@
 
 For current and future plans, see [Development track](Development_track.md) and [Future plans](Future_plans.md).
 
-## Version 4.8.2
+## Version 4.8.3
 
 Released January 2025.
 
diff --git a/doc/en/Installation/STACK_versions.md b/doc/en/Installation/STACK_versions.md
index 34a89c0b27661d3c0113be8bc4d2ffdff8bee90b..731527e00229181c59885a08267732c3656c22ec 100644
--- a/doc/en/Installation/STACK_versions.md
+++ b/doc/en/Installation/STACK_versions.md
@@ -9,7 +9,7 @@ when releasing.
 
 Release | Version number | Supported Maxima versions
 --------|----------------|--------------------------
-4.8.2 | 2025122100 | 5.40.0, 5.41.0, 5.42.0, 5.42.1, 5.42.2, 5.43.0, 5.43.1, 5.43.2, 5.44.0, 5.46.0, 5.47.0
+4.8.3 | 2025012100 | 5.40.0, 5.41.0, 5.42.0, 5.42.1, 5.42.2, 5.43.0, 5.43.1, 5.43.2, 5.44.0, 5.46.0, 5.47.0
 4.8.0 | 2024111500 | 5.40.0, 5.41.0, 5.42.0, 5.42.1, 5.42.2, 5.43.0, 5.43.1, 5.43.2, 5.44.0, 5.46.0, 5.47.0
 4.7.0 | 2024072400 | 5.40.0, 5.41.0, 5.42.0, 5.42.1, 5.42.2, 5.43.0, 5.43.1, 5.43.2, 5.44.0, 5.46.0, 5.47.0
 4.6.0 | 2024060300 | 5.40.0, 5.41.0, 5.42.0, 5.42.1, 5.42.2, 5.43.0, 5.43.1, 5.43.2, 5.44.0, 5.46.0, 5.47.0
diff --git a/stack/maxima/stackmaxima.mac b/stack/maxima/stackmaxima.mac
index 33a4964805e53e97a0e1f0417e937ca5e1852ecd..4e11d3e0a3d00f6ffca352f7e04b07f6655a42ce 100644
--- a/stack/maxima/stackmaxima.mac
+++ b/stack/maxima/stackmaxima.mac
@@ -3357,4 +3357,4 @@ is_lang(code):=ev(is(%_STACK_LANG=code),simp=true)$
 
 /* Stack expects some output with the version number the output happens at */
 /* maximalocal.mac after additional library loading */
-stackmaximaversion:2025122100$
+stackmaximaversion:2025012100$
diff --git a/version.php b/version.php
index 2c59254e9b272af8b8f2e71ede5bf749889663b6..26ca3068e0f30b468045baad1ae2b78a754bfba4 100644
--- a/version.php
+++ b/version.php
@@ -24,12 +24,12 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version   = 2025122100;
+$plugin->version   = 2025012100;
 $plugin->requires  = 2022041900;
 $plugin->cron      = 0;
 $plugin->component = 'qtype_stack';
 $plugin->maturity  = MATURITY_STABLE;
-$plugin->release   = '4.8.2 for Moodle 4.0+';
+$plugin->release   = '4.8.3 for Moodle 4.0+';
 
 $plugin->dependencies = [
     'qbehaviour_adaptivemultipart'     => 2020103000,