diff --git a/cypress/e2e/plugins/2-prototype-kit-plugin-tests/handle-plugin-update-when-a-dependency-is-now-required.cypress.js b/cypress/e2e/plugins/2-prototype-kit-plugin-tests/handle-plugin-update-when-a-dependency-is-now-required.cypress.js
new file mode 100644
index 0000000000..58b62147f6
--- /dev/null
+++ b/cypress/e2e/plugins/2-prototype-kit-plugin-tests/handle-plugin-update-when-a-dependency-is-now-required.cypress.js
@@ -0,0 +1,48 @@
+import { installPlugin, uninstallPlugin, waitForApplication } from '../../utils'
+
+const plugin = '@govuk-prototype-kit/common-templates'
+const pluginVersion = '1.1.1'
+const pluginsPage = '/manage-prototype/plugins'
+
+const dependencyPlugin = 'govuk-frontend'
+const dependencyPluginName = 'GOV.UK Frontend'
+
+describe('Handle a plugin update', () => {
+  it('when a dependency is now required', () => {
+    installPlugin(plugin, pluginVersion)
+    uninstallPlugin(dependencyPlugin)
+
+    waitForApplication(pluginsPage)
+
+    cy.get('[data-plugin-group-status="available"]')
+      .find(`[data-plugin-package-name="${dependencyPlugin}"]`)
+      .find('button')
+      .contains('Install')
+
+    cy.get('[data-plugin-group-status="installed"]')
+      .find(`[data-plugin-package-name="${plugin}"]`)
+      .find('button')
+      .contains('Update')
+      .click()
+
+    cy.get('#plugin-action-confirmation')
+      .find('ul')
+      .contains(dependencyPluginName)
+
+    cy.get('#plugin-action-button').click()
+
+    cy.get('#panel-complete', { timeout: 20000 })
+      .should('be.visible')
+      .contains('Update complete')
+
+    cy.get('#instructions-complete a')
+      .contains('Back to plugins')
+      .click()
+
+    cy.get('[data-plugin-group-status="installed"]')
+      .find(`[data-plugin-package-name="${dependencyPlugin}"]`)
+
+    cy.get('[data-plugin-group-status="installed"]')
+      .find(`[data-plugin-package-name="${plugin}"]`)
+  })
+})
diff --git a/lib/manage-prototype-handlers.js b/lib/manage-prototype-handlers.js
index 10416f0406..03bab87ffb 100644
--- a/lib/manage-prototype-handlers.js
+++ b/lib/manage-prototype-handlers.js
@@ -444,7 +444,10 @@ function getCommand (mode, chosenPlugin) {
     dependentPlugins
   } = chosenPlugin
   const dependents = dependentPlugins?.map(({ packageName }) => packageName).join(' ')
-  const dependencies = dependencyPlugins?.map(({ packageName }) => packageName).join(' ')
+  const dependencies = dependencyPlugins?.map(({
+    packageName,
+    latestVersion
+  }) => packageName + '@' + latestVersion).join(' ')
 
   if (version && installCommand) {
     installCommand += `@${version}`
@@ -474,19 +477,22 @@ const verbs = {
     title: 'Update',
     para: 'update',
     status: 'updated',
-    progressive: 'updating'
+    progressive: 'updating',
+    dependencyPara: 'install'
   },
   install: {
     title: 'Install',
     para: 'install',
     status: 'installed',
-    progressive: 'installing'
+    progressive: 'installing',
+    dependencyPara: 'install'
   },
   uninstall: {
     title: 'Uninstall',
     para: 'uninstall',
     status: 'uninstalled',
-    progressive: 'uninstalling'
+    progressive: 'uninstalling',
+    dependencyPara: 'uninstall'
   }
 }
 
@@ -533,21 +539,15 @@ async function getPluginForRequest (req) {
     }
   }
 
-  const dependentPlugins = mode === 'uninstall'
-    ? (await getDependentPackages(chosenPlugin.packageName))
-        .filter(({ installed }) => installed)
-        .map(buildPluginData)
-    : []
+  const dependentPlugins = (await getDependentPackages(chosenPlugin.packageName, version, mode))
+    .filter(({ installed }) => installed || mode !== 'uninstall')
+    .map(buildPluginData)
 
   if (dependentPlugins.length) {
     chosenPlugin.dependentPlugins = dependentPlugins
   }
 
-  const dependencyPlugins = mode !== 'uninstall'
-    ? (await getDependencyPackages(chosenPlugin.packageName, version))
-        .filter(({ installed }) => !installed)
-        .map(buildPluginData)
-    : []
+  const dependencyPlugins = (await getDependencyPackages(chosenPlugin.packageName, version, mode)).map(buildPluginData)
 
   if (dependencyPlugins.length) {
     chosenPlugin.dependencyPlugins = dependencyPlugins
diff --git a/lib/nunjucks/views/manage-prototype/plugin-install-or-uninstall.njk b/lib/nunjucks/views/manage-prototype/plugin-install-or-uninstall.njk
index a01a082f3b..866ddbe1cb 100644
--- a/lib/nunjucks/views/manage-prototype/plugin-install-or-uninstall.njk
+++ b/lib/nunjucks/views/manage-prototype/plugin-install-or-uninstall.njk
@@ -47,7 +47,7 @@
           </ul>
 
           <p class="govuk-body">
-            To {{ verb.para }} {{ chosenPlugin.name }} you also need to {{ verb.para }} {% if chosenPlugin.dependentPlugins | length > 1 %}these plugins{% else %}this plugin{% endif %}.
+            To {{ verb.para }} {{ chosenPlugin.name }} you also need to {{ verb.dependencyPara }} {% if chosenPlugin.dependentPlugins | length > 1 %}these plugins{% else %}this plugin{% endif %}.
           </p>
           <div class="govuk-button-group">
             {{ govukButton({
diff --git a/lib/plugins/packages.js b/lib/plugins/packages.js
index e52959509f..a24e735f36 100644
--- a/lib/plugins/packages.js
+++ b/lib/plugins/packages.js
@@ -118,7 +118,7 @@ async function refreshPackageInfo (packageName, version) {
     localVersion = path.resolve(installedPackageVersion.replace('file:', ''))
   }
 
-  const pluginDependencies = pluginConfig?.pluginDependencies
+  const pluginDependencies = pluginConfig?.pluginDependencies ? normaliseDependencies(pluginConfig.pluginDependencies) : undefined
 
   const packageInfo = {
     packageName,
@@ -206,7 +206,21 @@ async function waitForPackagesCache () {
   }
 }
 
-async function getDependentPackages (packageName) {
+function normaliseDependencies (dependencies) {
+  return dependencies.map((dependency) => {
+    if (typeof dependency === 'string') {
+      dependency = {
+        packageName: dependency
+      }
+    }
+    return dependency
+  })
+}
+
+async function getDependentPackages (packageName, version, mode) {
+  if (mode !== 'uninstall') {
+    return []
+  }
   if (!Object.keys(packagesCache).length) {
     await startPackageTracker()
   }
@@ -215,17 +229,29 @@ async function getDependentPackages (packageName) {
     .filter(({ pluginDependencies }) => pluginDependencies?.some((pluginDependency) => pluginDependency === packageName || pluginDependency.packageName === packageName))
 }
 
-async function getDependencyPackages (packageName, version) {
+async function getDependencyPackages (packageName, version, mode) {
   if (!Object.keys(packagesCache).length) {
     await startPackageTracker()
   }
   await waitForPackagesCache()
   const pkg = await lookupPackageInfo(packageName, version)
-  return !pkg?.pluginDependencies
+  let pluginDependencies = pkg?.pluginDependencies
+  if (version || mode === 'update') {
+    const targetVersion = version || pkg.latestVersion
+    if (targetVersion !== pkg.installedVersion) {
+      const latestPluginConfig = await getConfigForPackage(pkg.packageName, version)
+      if (latestPluginConfig) {
+        pluginDependencies = latestPluginConfig.pluginDependencies
+      }
+    }
+  }
+  const dependencyPlugins = !pluginDependencies
     ? []
-    : await Promise.all(pkg.pluginDependencies.map((pluginDependency) => {
-      return typeof pluginDependency === 'string' ? lookupPackageInfo(pluginDependency) : lookupPackageInfo(pluginDependency.packageName)
+    : await Promise.all(normaliseDependencies(pluginDependencies).map((pluginDependency) => {
+      return lookupPackageInfo(pluginDependency.packageName)
     }))
+
+  return dependencyPlugins.filter(({ installed }) => !installed)
 }
 
 if (!config.getConfig().isTest) {
diff --git a/lib/plugins/packages.spec.js b/lib/plugins/packages.spec.js
index 468db75538..d69179929b 100644
--- a/lib/plugins/packages.spec.js
+++ b/lib/plugins/packages.spec.js
@@ -43,23 +43,29 @@ describe('packages', () => {
     const availableInstalledPackage = {
       packageName: 'available-installed-package',
       installed: true,
-      available: true
+      available: true,
+      installedVersion: '1.0.0',
+      latestVersion: '1.0.0'
     }
     const availableUninstalledPackage = {
       packageName: 'available-uninstalled-package',
       installed: false,
-      available: true
+      available: true,
+      latestVersion: '1.0.0'
     }
     const unavailableInstalledPackage = {
       packageName: 'unavailable-installed-package',
       installed: true,
       available: false,
+      installedVersion: '1.0.0',
+      latestVersion: '1.0.0',
       pluginDependencies: [availableInstalledPackage]
     }
     const unavailableUninstalledPackage = {
       packageName: 'unavailable-uninstalled-package',
       installed: false,
       available: false,
+      latestVersion: '1.0.0',
       pluginDependencies: [availableUninstalledPackage]
     }
 
@@ -86,10 +92,15 @@ describe('packages', () => {
     })
 
     describe('getDependentPackages', () => {
-      it('', async () => {
-        const dependentPackages = await getDependentPackages(availableInstalledPackage.packageName)
+      it('when mode is uninstall', async () => {
+        const dependentPackages = await getDependentPackages(availableInstalledPackage.packageName, undefined, 'uninstall')
         expect(dependentPackages).toEqual([unavailableInstalledPackage])
       })
+
+      it('when mode is update', async () => {
+        const dependentPackages = await getDependentPackages(availableInstalledPackage.packageName, '1.1.1', 'update')
+        expect(dependentPackages).toEqual([])
+      })
     })
 
     describe('getDependencyPackages', () => {
diff --git a/lib/utils/requestHttps.js b/lib/utils/requestHttps.js
index 16720fd2f9..3afe27ad17 100644
--- a/lib/utils/requestHttps.js
+++ b/lib/utils/requestHttps.js
@@ -7,7 +7,7 @@ const { tmpDir } = require('./paths')
 const { exists, readJson, ensureDir, writeJson } = require('fs-extra')
 const { verboseLog } = require('./verboseLogger')
 
-async function getConfigForPackage (packageName) {
+async function getConfigForPackage (packageName, version) {
   const timer = startPerformanceTimer()
 
   const cacheFileDirectory = path.join(tmpDir, 'caches')
@@ -32,19 +32,19 @@ async function getConfigForPackage (packageName) {
 
     return undefined
   }
-  const latestTag = registry['dist-tags']?.latest
+  const targetVersion = version || registry['dist-tags']?.latest
 
-  if (cache[packageName] && cache[packageName][latestTag]) {
+  if (cache[packageName] && cache[packageName][targetVersion]) {
     endPerformanceTimer('getConfigForPackage (from cache)', timer)
-    return cache[packageName][latestTag]
+    return cache[packageName][targetVersion]
   }
 
-  if (!latestTag) {
-    endPerformanceTimer('getConfigForPackage (no latest tag)', timer)
+  if (!targetVersion || !registry.versions[targetVersion]) {
+    endPerformanceTimer(`getConfigForPackage (no ${targetVersion ? 'version ' + targetVersion : 'latest tag'})`, timer)
     return
   }
 
-  const url = registry.versions[latestTag].dist.tarball
+  const url = registry.versions[targetVersion].dist.tarball
   try {
     const result = await findFileInHttpsTgz(url, {
       fileToFind: 'package/govuk-prototype-kit.config.json',
@@ -52,7 +52,7 @@ async function getConfigForPackage (packageName) {
         if (str && str.startsWith('{')) {
           const result = JSON.parse(str)
           cache[packageName] = cache[packageName] || {}
-          cache[packageName][latestTag] = result
+          cache[packageName][targetVersion] = result
           writeJson(cacheFileReference, cache)
           return result
         }