diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8c6b4b..d264a4d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,9 +2,22 @@
 
 All notable changes to this project will be documented in this file.
 
+## [4.20.3] - 10.02.2026
+
+### Changes in pom.xml
+
+- Update `mapapps.version` property to `4.20.3`
+- Update `ct.jsregistry.version` property to `2.1.10`
+- (Optional): the placeholder `apprt.version` is used in place of `mapapps.version` for all dependencies which transport map.apps javascript resources.
+
+### Changes in package.json
+
+- In the devDependencies section, change `@conterra/ct-mapapps-typings` to `4.20.3`
+
 ## [4.20.2] - 28.11.2025
 
 ### Changes in pom.xml
+
 - Update `mapapps.version` property to `4.20.2`
 
 ## [4.20.1] - never released
@@ -23,11 +36,13 @@ Version number accidentally reserved in npm registry.
   - The `gulpfile.js` was updated to load environment variables from a `.env` file if present.
 
 ### Changes in pom.xml
+
 - Update `mapapps.version` property to `4.20.0`
 - Update `ct.jsregistry.version` property to `2.1.9`
 - Update `frontend-maven-plugin` plugin version to `1.15.4`
 
 ### Changes in package.json
+
 - In the dependencies section, change `"arcgis-js-api": "4.31.6"` to `"@arcgis/core": "4.33.14"`
 - In the devDependencies section, change `@conterra/ct-mapapps-typings` to `4.20.0`
 - In the devDependencies section, change `ct-mapapps-gulp-js` to `0.10.15`
diff --git a/README.md b/README.md
index a53dcb5..b266410 100644
--- a/README.md
+++ b/README.md
@@ -70,13 +70,21 @@ For details about end-to-end testing refer to the [Developer's Guide](https://do
 
 ## Updating from older versions
 
+### from 4.20.2 to 4.20.3
+
+See [Changelog](./CHANGELOG.md#4203---10022026)
+
+### from 4.20.0 to 4.20.2
+
+See [Changelog](./CHANGELOG.md#4202---28112025)
+
 ### from 4.19.3 to 4.20.0
 
-See [Changelog](./CHANGELOG.md#4200---TBD)
+See [Changelog](./CHANGELOG.md#4200---19112025)
 
 ### from 4.19.2 to 4.19.3
 
-See [Changelog](./CHANGELOG.md#4193---TBD)
+See [Changelog](./CHANGELOG.md#4193---11072025)
 
 ### from 4.19.1 to 4.19.2
 
diff --git a/package.json b/package.json
index 67110c2..e119033 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
         "vue": "2.7.16"
     },
     "devDependencies": {
-        "@conterra/ct-mapapps-typings": "4.20.0",
+        "@conterra/ct-mapapps-typings": "4.20.3",
         "@conterra/mapapps-mocha-runner": "1.1.1",
         "@conterra/reactivity-core": "0.8.0",
         "@playwright/test": "^1.52.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 44663a8..748b9c0 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -19,8 +19,8 @@ importers:
         version: 2.7.16
     devDependencies:
       '@conterra/ct-mapapps-typings':
-        specifier: 4.20.0
-        version: 4.20.0
+        specifier: 4.20.3
+        version: 4.20.3
       '@conterra/mapapps-mocha-runner':
         specifier: 1.1.1
         version: 1.1.1(mocha@11.7.4)
@@ -661,8 +661,8 @@ packages:
     resolution: {integrity: sha512-bkFqkLhh3pMBUQQkpVgWDWq/lqzc2678eUyDlTBhRqhCHFguYYGM0Efga7tYk4TogG/3x0EEl66/OQ+WGbWB/Q==}
     engines: {node: '>=6.9.0'}
 
-  '@conterra/ct-mapapps-typings@4.20.0':
-    resolution: {integrity: sha512-CoOP56OeCmr5s3AF3ePbs27SExBLU+H4AJ5VcY4+h5VpzHZaqrzs84YlEUHEVGUUxLhptgEzv9MvH9Q7j2gEtQ==}
+  '@conterra/ct-mapapps-typings@4.20.3':
+    resolution: {integrity: sha512-fbVyuRGb1M9/RNsYYEtQVefyzxJfQlRITrJEcTk2mLs8946PUdnAATJUjrzizvhOBhAOrsQQIpNMYaNHpI8M2g==}
 
   '@conterra/mapapps-mocha-runner@1.1.1':
     resolution: {integrity: sha512-ItUeCIibsAxt6oXDjCSFhq+1nZbdQT7HqBgLeUrP/BrWWfM5LUvC6ejPD7mqE68h5o0bLQQetmrS6+yF9PsWxg==}
@@ -6294,7 +6294,7 @@ snapshots:
       '@babel/helper-string-parser': 7.27.1
       '@babel/helper-validator-identifier': 7.27.1
 
-  '@conterra/ct-mapapps-typings@4.20.0': {}
+  '@conterra/ct-mapapps-typings@4.20.3': {}
 
   '@conterra/mapapps-mocha-runner@1.1.1(mocha@11.7.4)':
     dependencies:
diff --git a/pom.xml b/pom.xml
index ede3324..8c2bb02 100644
--- a/pom.xml
+++ b/pom.xml
@@ -13,7 +13,7 @@
             <dependency>
                 <groupId>de.conterra.mapapps</groupId>
                 <artifactId>ct-mapapps-js-bom</artifactId>
-                <version>${mapapps.version}</version>
+                <version>${apprt.version}</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
@@ -24,7 +24,7 @@
         <dependency>
             <groupId>de.conterra.mapapps</groupId>
             <artifactId>ct-mapapps-js-bom-dev-test</artifactId>
-            <version>${mapapps.version}</version>
+            <version>${apprt.version}</version>
             <type>pom</type>
             <scope>test</scope>
         </dependency>
@@ -341,12 +341,12 @@
         <js.build.outputPath>${root.build.outputPath}/js</js.build.outputPath>
 
 
-        <mapapps.version>4.20.2</mapapps.version>
+        <mapapps.version>4.20.3</mapapps.version>
         <!-- JS lib versions -->
         <apprt.version>${mapapps.version}</apprt.version>
 
         <!-- java lib versions -->
-        <ct.jsregistry.version>2.1.9</ct.jsregistry.version>
+        <ct.jsregistry.version>2.1.10</ct.jsregistry.version>
 
         <!-- the default app, replaced in the *.html files to switch app names-->
         <default.app.name>Demo</default.app.name>
@@ -386,7 +386,7 @@
                 <dependency>
                     <groupId>de.conterra.mapapps</groupId>
                     <artifactId>ct-mapapps-js-bom-dev</artifactId>
-                    <version>${mapapps.version}</version>
+                    <version>${apprt.version}</version>
                     <type>pom</type>
                     <scope>test</scope>
                 </dependency>
@@ -573,7 +573,7 @@
                 <dependency>
                     <groupId>de.conterra.mapapps</groupId>
                     <artifactId>ct-mapapps-js-bom-prod</artifactId>
-                    <version>${mapapps.version}</version>
+                    <version>${apprt.version}</version>
                     <type>pom</type>
                     <scope>test</scope>
                 </dependency>