diff --git a/include/app.hpp b/include/app.hpp
index 59a1b0d1..2e59e654 100644
--- a/include/app.hpp
+++ b/include/app.hpp
@@ -534,13 +534,15 @@ struct RackScene : Scene {
 extern std::string gApplicationName;
 extern std::string gApplicationVersion;
 extern std::string gApiHost;
+extern std::string gLatestVersion;
+extern bool gCheckVersion;
 
 // Easy access to "singleton" widgets
 extern RackScene *gRackScene;
 extern RackWidget *gRackWidget;
 extern Toolbar *gToolbar;
 
-void appInit();
+void appInit(bool devMode);
 void appDestroy();
 void appModuleBrowserCreate();
 json_t *appModuleBrowserToJson();
diff --git a/include/settings.hpp b/include/settings.hpp
index c0a8858d..5f89d5a8 100644
--- a/include/settings.hpp
+++ b/include/settings.hpp
@@ -6,11 +6,10 @@
 namespace rack {
 
 
+extern bool gSkipAutosaveOnLaunch;
+
 void settingsSave(std::string filename);
 void settingsLoad(std::string filename);
 
 
-extern bool skipAutosaveOnLaunch;
-
-
 } // namespace rack
diff --git a/include/util/request.hpp b/include/util/request.hpp
index 86fa2208..fad102d2 100644
--- a/include/util/request.hpp
+++ b/include/util/request.hpp
@@ -13,9 +13,11 @@ enum RequestMethod {
 	METHOD_DELETE,
 };
 
-/** Requests a JSON API URL over HTTP(S), using the data as the query (GET) or the body (POST, etc) */
+/** Requests a JSON API URL over HTTP(S), using the data as the query (GET) or the body (POST, etc)
+Caller must json_decref().
+*/
 json_t *requestJson(RequestMethod method, std::string url, json_t *dataJ);
-/** Returns the filename, blank if unsuccessful */
+/** Returns true if downloaded successfully */
 bool requestDownload(std::string url, std::string filename, float *progress);
 /** URL-encodes `s` */
 std::string requestEscape(std::string s);
diff --git a/src/app/RackScene.cpp b/src/app/RackScene.cpp
index 2ebc9657..71ed6147 100644
--- a/src/app/RackScene.cpp
+++ b/src/app/RackScene.cpp
@@ -1,6 +1,7 @@
 #include "app.hpp"
 #include "window.hpp"
 #include "util/request.hpp"
+#include "osdialog.h"
 #include <string.h>
 #include <thread>
 
@@ -40,6 +41,17 @@ void RackScene::step() {
 	Scene::step();
 
 	zoomWidget->box.size = gRackWidget->box.size.mult(zoomWidget->zoom);
+
+	// Version popup message
+	if (!gLatestVersion.empty()) {
+		std::string versionMessage = stringf("Rack %s is available.\n\nYou have Rack %s.\n\nClose Rack and download new version on the website?", gLatestVersion.c_str(), gApplicationVersion.c_str());
+		if (osdialog_message(OSDIALOG_INFO, OSDIALOG_OK_CANCEL, versionMessage.c_str())) {
+			std::thread t(systemOpenBrowser, "https://vcvrack.com/");
+			t.detach();
+			windowClose();
+		}
+		gLatestVersion = "";
+	}
 }
 
 void RackScene::draw(NVGcontext *vg) {
diff --git a/src/app/app.cpp b/src/app/app.cpp
index bd94da9b..5fec6af6 100644
--- a/src/app/app.cpp
+++ b/src/app/app.cpp
@@ -1,23 +1,49 @@
 #include "app.hpp"
+#include "util/request.hpp"
+#include <thread>
 
 
 namespace rack {
 
 
-bool gDev = false;
 std::string gApplicationName = "VCV Rack";
 std::string gApplicationVersion = TOSTRING(VERSION);
 std::string gApiHost = "https://api.vcvrack.com";
 // std::string gApiHost = "http://localhost:8081";
+std::string gLatestVersion;
+bool gCheckVersion = true;
+
 
 RackWidget *gRackWidget = NULL;
 Toolbar *gToolbar = NULL;
 RackScene *gRackScene = NULL;
 
 
-void appInit() {
+static void checkVersion() {
+	json_t *resJ = requestJson(METHOD_GET, gApiHost + "/version", NULL);
+
+	if (resJ) {
+		json_t *versionJ = json_object_get(resJ, "version");
+		if (versionJ) {
+			const char *version = json_string_value(versionJ);
+			if (version && version != gApplicationVersion) {
+				gLatestVersion = version;
+			}
+		}
+		json_decref(resJ);
+	}
+}
+
+
+void appInit(bool devMode) {
 	gRackScene = new RackScene();
 	gScene = gRackScene;
+
+	// Request latest version from server
+	if (!devMode && gCheckVersion) {
+		std::thread t(checkVersion);
+		t.detach();
+	}
 }
 
 void appDestroy() {
diff --git a/src/main.cpp b/src/main.cpp
index 68cf3610..6bc28b6f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -58,16 +58,16 @@ int main(int argc, char* argv[]) {
 	keyboardInit();
 	gamepadInit();
 	windowInit();
-	appInit();
+	appInit(devMode);
 	settingsLoad(assetLocal("settings.json"));
 
 	if (patchFile.empty()) {
 		std::string oldLastPath = gRackWidget->lastPath;
 		// To prevent launch crashes, if Rack crashes between now and 15 seconds from now, the "skipAutosaveOnLaunch" property will remain in settings.json, so that in the next launch, the broken autosave will not be loaded.
-		bool oldSkipAutosaveOnLaunch = skipAutosaveOnLaunch;
-		skipAutosaveOnLaunch = true;
+		bool oldSkipAutosaveOnLaunch = gSkipAutosaveOnLaunch;
+		gSkipAutosaveOnLaunch = true;
 		settingsSave(assetLocal("settings.json"));
-		skipAutosaveOnLaunch = false;
+		gSkipAutosaveOnLaunch = false;
 		if (oldSkipAutosaveOnLaunch && osdialog_message(OSDIALOG_INFO, OSDIALOG_YES_NO, "Rack has recovered from a crash, possibly caused by a faulty module in your patch. Would you like to clear your patch and start over?")) {
 			// Do nothing. Empty patch is already loaded.
 		}
diff --git a/src/settings.cpp b/src/settings.cpp
index 5f02195f..29fdd9fd 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -9,7 +9,7 @@
 namespace rack {
 
 
-bool skipAutosaveOnLaunch = false;
+bool gSkipAutosaveOnLaunch = false;
 
 
 static json_t *settingsToJson() {
@@ -60,7 +60,7 @@ static json_t *settingsToJson() {
 	json_object_set_new(rootJ, "lastPath", lastPathJ);
 
 	// skipAutosaveOnLaunch
-	if (skipAutosaveOnLaunch) {
+	if (gSkipAutosaveOnLaunch) {
 		json_object_set_new(rootJ, "skipAutosaveOnLaunch", json_true());
 	}
 
@@ -70,6 +70,9 @@ static json_t *settingsToJson() {
 	// powerMeter
 	json_object_set_new(rootJ, "powerMeter", json_boolean(gPowerMeter));
 
+	// checkVersion
+	json_object_set_new(rootJ, "checkVersion", json_boolean(gCheckVersion));
+
 	return rootJ;
 }
 
@@ -132,7 +135,7 @@ static void settingsFromJson(json_t *rootJ) {
 	// skipAutosaveOnLaunch
 	json_t *skipAutosaveOnLaunchJ = json_object_get(rootJ, "skipAutosaveOnLaunch");
 	if (skipAutosaveOnLaunchJ)
-		skipAutosaveOnLaunch = json_boolean_value(skipAutosaveOnLaunchJ);
+		gSkipAutosaveOnLaunch = json_boolean_value(skipAutosaveOnLaunchJ);
 
 	// moduleBrowser
 	json_t *moduleBrowserJ = json_object_get(rootJ, "moduleBrowser");
@@ -143,6 +146,11 @@ static void settingsFromJson(json_t *rootJ) {
 	json_t *powerMeterJ = json_object_get(rootJ, "powerMeter");
 	if (powerMeterJ)
 		gPowerMeter = json_boolean_value(powerMeterJ);
+
+	// checkVersion
+	json_t *checkVersionJ = json_object_get(rootJ, "checkVersion");
+	if (checkVersionJ)
+		gCheckVersion = json_boolean_value(checkVersionJ);
 }
 
 
diff --git a/src/util/request.cpp b/src/util/request.cpp
index c8368aaf..1e2324e6 100644
--- a/src/util/request.cpp
+++ b/src/util/request.cpp
@@ -115,6 +115,9 @@ static int xferInfoCallback(void *clientp, curl_off_t dltotal, curl_off_t dlnow,
 }
 
 bool requestDownload(std::string url, std::string filename, float *progress) {
+	if (progress)
+		*progress = 0.f;
+
 	CURL *curl = curl_easy_init();
 	if (!curl)
 		return false;