diff --git a/app/assets/javascripts/admin/components/ace-editor.js b/app/assets/javascripts/admin/components/ace-editor.js
index a67d8139654ce0..f4868546757d4f 100644
--- a/app/assets/javascripts/admin/components/ace-editor.js
+++ b/app/assets/javascripts/admin/components/ace-editor.js
@@ -81,7 +81,7 @@ export default Component.extend({
 
   didInsertElement() {
     this._super(...arguments);
-    loadScript("/javascripts/ace/ace.js?v=1.4.12").then(() => {
+    loadScript("/javascripts/ace/ace.js").then(() => {
       window.ace.require(["ace/ace"], loadedAce => {
         loadedAce.config.set("loadWorkerFromBlob", false);
         loadedAce.config.set("workerPath", getURL("/javascripts/ace")); // Do not use CDN for workers
diff --git a/app/assets/javascripts/discourse/app/lib/load-script.js b/app/assets/javascripts/discourse/app/lib/load-script.js
index 52babb1952f96d..1a014fcb248dd3 100644
--- a/app/assets/javascripts/discourse/app/lib/load-script.js
+++ b/app/assets/javascripts/discourse/app/lib/load-script.js
@@ -1,6 +1,7 @@
 import { default as getURL, getURLWithCDN } from "discourse-common/lib/get-url";
 import { run } from "@ember/runloop";
 import { ajax } from "discourse/lib/ajax";
+import { PUBLIC_JS_VERSIONS } from "discourse/lib/public_js_versions";
 import { Promise } from "rsvp";
 
 const _loaded = {};
@@ -16,7 +17,7 @@ function loadWithTag(path, cb) {
     Ember.Test.registerWaiter(() => finished);
   }
 
-  s.onload = s.onreadystatechange = function(_, abort) {
+  s.onload = s.onreadystatechange = function (_, abort) {
     finished = true;
     if (
       abort ||
@@ -50,6 +51,10 @@ export default function loadScript(url, opts) {
     return Promise.resolve();
   }
 
+  if (PUBLIC_JS_VERSIONS && !opts.css) {
+    url = cacheBuster(url);
+  }
+
   // Scripts should always load from CDN
   // CSS is type text, to accept it from a CDN we would need to handle CORS
   const fullUrl = opts.css ? getURL(url) : getURLWithCDN(url);
@@ -62,7 +67,7 @@ export default function loadScript(url, opts) {
     }
   });
 
-  return new Promise(function(resolve) {
+  return new Promise(function (resolve) {
     // If we already loaded this url
     if (_loaded[fullUrl]) {
       return resolve();
@@ -72,15 +77,15 @@ export default function loadScript(url, opts) {
     }
 
     let done;
-    _loading[fullUrl] = new Promise(function(_done) {
+    _loading[fullUrl] = new Promise(function (_done) {
       done = _done;
     });
 
-    _loading[fullUrl].then(function() {
+    _loading[fullUrl].then(function () {
       delete _loading[fullUrl];
     });
 
-    const cb = function(data) {
+    const cb = function (data) {
       if (opts && opts.css) {
         $("head").append("<style>" + data + "</style>");
       }
@@ -94,7 +99,7 @@ export default function loadScript(url, opts) {
       ajax({
         url: fullUrl,
         dataType: "text",
-        cache: true
+        cache: true,
       }).then(cb);
     } else {
       // Always load JavaScript with script tag to avoid Content Security Policy inline violations
@@ -102,3 +107,17 @@ export default function loadScript(url, opts) {
     }
   });
 }
+
+export function cacheBuster(url) {
+  if (PUBLIC_JS_VERSIONS) {
+    const pathParts = url.split("/");
+    if (pathParts[1] === "javascripts") {
+      const version = PUBLIC_JS_VERSIONS[pathParts[2]];
+      if (version !== undefined) {
+        return `${url}?v=${version}`;
+      }
+    }
+  }
+
+  return url;
+}
diff --git a/app/assets/javascripts/discourse/app/lib/public_js_versions.js b/app/assets/javascripts/discourse/app/lib/public_js_versions.js
new file mode 100644
index 00000000000000..453e04069351f5
--- /dev/null
+++ b/app/assets/javascripts/discourse/app/lib/public_js_versions.js
@@ -0,0 +1,12 @@
+// DO NOT EDIT THIS FILE!!!
+// Update it by running `rake javascript:update`
+
+export const PUBLIC_JS_VERSIONS = {
+  ace: "1.4.12",
+  "Chart.min.js": "2.9.3",
+  "chartjs-plugin-datalabels.min.js": "0.7.0",
+  "jquery.magnific-popup.min.js": "1.1.0",
+  "pikaday.js": "1.8.0",
+  "spectrum.js": "1.8.0",
+  workbox: "4.3.1",
+};
diff --git a/app/assets/javascripts/discourse/app/pre-initializers/discourse-bootstrap.js b/app/assets/javascripts/discourse/app/pre-initializers/discourse-bootstrap.js
index 15b9ef82922cbf..7728f903d6f577 100644
--- a/app/assets/javascripts/discourse/app/pre-initializers/discourse-bootstrap.js
+++ b/app/assets/javascripts/discourse/app/pre-initializers/discourse-bootstrap.js
@@ -6,7 +6,7 @@ import {
   setEnvironment,
   isTesting,
   isProduction,
-  isDevelopment
+  isDevelopment,
 } from "discourse-common/config/environment";
 import { setupURL, setupS3CDN } from "discourse-common/lib/get-url";
 import deprecated from "discourse-common/lib/deprecated";
@@ -32,7 +32,7 @@ export default {
     if (preloadedDataElement) {
       const preloaded = JSON.parse(preloadedDataElement.dataset.preloaded);
 
-      Object.keys(preloaded).forEach(function(key) {
+      Object.keys(preloaded).forEach(function (key) {
         PreloadStore.store(key, JSON.parse(preloaded[key]));
 
         if (setupData.debugPreloadedAppData === "true") {
@@ -48,20 +48,20 @@ export default {
       get() {
         deprecated(`use "get-url" helpers instead of Discourse.BaseUrl`, {
           since: "2.5",
-          dropFrom: "2.6"
+          dropFrom: "2.6",
         });
         return baseUrl;
-      }
+      },
     });
     let baseUri = setupData.baseUri;
     Object.defineProperty(app, "BaseUri", {
       get() {
         deprecated(`use "get-url" helpers instead of Discourse.BaseUri`, {
           since: "2.5",
-          dropFrom: "2.6"
+          dropFrom: "2.6",
         });
         return baseUri;
-      }
+      },
     });
     setupURL(setupData.cdn, baseUrl, setupData.baseUri);
     setEnvironment(setupData.environment);
@@ -102,7 +102,7 @@ export default {
       setupS3CDN(setupData.s3BaseUrl, setupData.s3Cdn);
     }
 
-    RSVP.configure("onerror", function(e) {
+    RSVP.configure("onerror", function (e) {
       // Ignore TransitionAborted exceptions that bubble up
       if (e && e.message === "TransitionAborted") {
         return;
@@ -125,5 +125,5 @@ export default {
 
       window.onerror(e && e.message, null, null, null, e);
     });
-  }
+  },
 };
diff --git a/lib/tasks/javascript.rake b/lib/tasks/javascript.rake
index a5f4a99c4f94ea..79168dce552ef4 100644
--- a/lib/tasks/javascript.rake
+++ b/lib/tasks/javascript.rake
@@ -16,10 +16,10 @@ def library_src
   "#{Rails.root}/node_modules"
 end
 
-def write_template(path, template)
+def write_template(path, task_name, template)
   header = <<~HEADER
     // DO NOT EDIT THIS FILE!!!
-    // Update it by running `rake javascript:update_constants`
+    // Update it by running `rake javascript:#{task_name}`
   HEADER
 
   basename = File.basename(path)
@@ -32,13 +32,15 @@ def write_template(path, template)
 end
 
 task 'javascript:update_constants' => :environment do
-  write_template("discourse/app/lib/constants.js", <<~JS)
+  task_name = 'update_constants'
+
+  write_template("discourse/app/lib/constants.js", task_name, <<~JS)
     export const SEARCH_PRIORITIES = #{Searchable::PRIORITIES.to_json};
 
     export const SEARCH_PHRASE_REGEXP = '#{Search::PHRASE_MATCH_REGEXP_PATTERN}';
   JS
 
-  write_template("pretty-text/addon/emoji/data.js", <<~JS)
+  write_template("pretty-text/addon/emoji/data.js", task_name, <<~JS)
     export const emojis = #{Emoji.standard.map(&:name).flatten.inspect};
     export const tonableEmojis = #{Emoji.tonable_emojis.flatten.inspect};
     export const aliases = #{Emoji.aliases.inspect.gsub("=>", ":")};
@@ -47,7 +49,7 @@ task 'javascript:update_constants' => :environment do
     export const replacements = #{Emoji.unicode_replacements_json};
   JS
 
-  write_template("pretty-text/addon/emoji/version.js", <<~JS)
+  write_template("pretty-text/addon/emoji/version.js", task_name, <<~JS)
     export const IMAGE_VERSION = "#{Emoji::EMOJI_VERSION}";
   JS
 end
@@ -84,7 +86,8 @@ task 'javascript:update' do
       public: true
     }, {
       source: 'spectrum-colorpicker/spectrum.css',
-      public: true
+      public: true,
+      skip_versioning: true
     }, {
       source: 'favcount/favcount.js'
     }, {
@@ -173,6 +176,7 @@ task 'javascript:update' do
 
   ]
 
+  versions = {}
   start = Time.now
 
   dependencies.each do |f|
@@ -206,6 +210,12 @@ task 'javascript:update' do
     if f[:public_root]
       dest = "#{public_root}/#{filename}"
     elsif f[:public]
+      unless f[:skip_versioning]
+        package_name = f[:source].split('/').first
+        package_version = JSON.parse(File.read("#{library_src}/#{package_name}/package.json"))["version"]
+        versions[filename] = package_version
+      end
+
       dest = "#{public_js}/#{filename}"
     else
       dest = "#{vendor_js}/#{filename}"
@@ -214,6 +224,7 @@ task 'javascript:update' do
     if src.include? "ace.js"
       ace_root = "#{library_src}/ace-builds/src-min-noconflict/"
       addtl_files = [ "ext-searchbox", "mode-html", "mode-scss", "mode-sql", "theme-chrome", "worker-html"]
+      FileUtils.mkdir(dest) unless File.directory?(dest)
       addtl_files.each do |file|
         FileUtils.cp_r("#{ace_root}#{file}.js", dest)
       end
@@ -236,5 +247,9 @@ task 'javascript:update' do
     end
   end
 
+  write_template("discourse/app/lib/public_js_versions.js", "update", <<~JS)
+    export const PUBLIC_JS_VERSIONS = #{versions.to_json};
+  JS
+
   STDERR.puts "Completed copying dependencies: #{(Time.now - start).round(2)} secs"
 end
diff --git a/test/javascripts/lib/load-script-test.js b/test/javascripts/lib/load-script-test.js
index e73a1bafa96ee0..cd457d3c275bb5 100644
--- a/test/javascripts/lib/load-script-test.js
+++ b/test/javascripts/lib/load-script-test.js
@@ -1,10 +1,11 @@
-import loadScript from "discourse/lib/load-script";
+import { loadScript, cacheBuster } from "discourse/lib/load-script";
+import { PUBLIC_JS_VERSIONS as jsVersions } from "discourse/lib/public_js_versions";
 
 QUnit.module("lib:load-script");
 
 QUnit.skip(
   "load with a script tag, and callbacks are only executed after script is loaded",
-  async assert => {
+  async (assert) => {
     assert.ok(
       typeof window.ace === "undefined",
       "ensures ace is not previously loaded"
@@ -19,3 +20,25 @@ QUnit.skip(
     );
   }
 );
+
+QUnit.test("works when a value is not present", async (assert) => {
+  assert.equal(
+    cacheBuster("/javascripts/my-script.js"),
+    "/javascripts/my-script.js"
+  );
+  assert.equal(
+    cacheBuster("/javascripts/my-project/script.js"),
+    "/javascripts/my-project/script.js"
+  );
+});
+
+QUnit.test("generates URLs with a hash", async (assert) => {
+  assert.equal(
+    cacheBuster("/javascripts/pikaday.js"),
+    `/javascripts/pikaday.js?v=${jsVersions["pikaday.js"]}`
+  );
+  assert.equal(
+    cacheBuster("/javascripts/ace/ace.js"),
+    `/javascripts/ace/ace.js?v=${jsVersions["ace"]}`
+  );
+});