diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index be2006e4..3411e44d 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1669,6 +1669,14 @@
     "message": "Sync failed.\nTry to re-login in Stylus options:\nclick 'disconnect' first, then 'connect'.",
     "description": "Tooltip for the toolbar icon"
   },
+  "syncErrorLock": {
+    "message": "The database is already in use. The lock will expire at $TIME$",
+    "placeholders": {
+      "time": {
+        "content": "$1"
+      }
+    }
+  },
   "syncStorageErrorSaving": {
     "message": "The value cannot be saved. Try reducing the amount of text.",
     "description": "Displayed when trying to save an excessively big value via storage.sync API"
diff --git a/background/sync-manager.js b/background/sync-manager.js
index 21a644c7..91a0753a 100644
--- a/background/sync-manager.js
+++ b/background/sync-manager.js
@@ -11,7 +11,6 @@ const syncMan = (() => {
 
   const SYNC_DELAY = 1; // minutes
   const SYNC_INTERVAL = 30; // minutes
-  const SYNC_LOCK_RETRIES = 10; // number of retries before the error is reported for scheduled sync
   const STATES = Object.freeze({
     connected: 'connected',
     connecting: 'connecting',
@@ -27,7 +26,6 @@ const syncMan = (() => {
     currentDriveName: null,
     errorMessage: null,
     login: false,
-    lockRetries: 0,
   };
   let lastError = null;
   let ctrl;
@@ -44,9 +42,7 @@ const syncMan = (() => {
 
   chrome.alarms.onAlarm.addListener(async ({name}) => {
     if (name === 'syncNow') {
-      await syncMan.syncNow({isScheduled: true});
-      const retrying = status.lockRetries / SYNC_LOCK_RETRIES * Math.random();
-      schedule(SYNC_DELAY + SYNC_INTERVAL * (retrying || 1));
+      await syncMan.syncNow();
     }
   });
 
@@ -143,7 +139,7 @@ const syncMan = (() => {
       emitStatusChange();
     },
 
-    async syncNow({isScheduled} = {}) {
+    async syncNow() {
       if (ready.then) await ready;
       if (!currentDrive || !status.login) {
         console.warn('cannot sync when disconnected');
@@ -154,18 +150,13 @@ const syncMan = (() => {
         status.errorMessage = null;
         lastError = null;
       } catch (err) {
+        err.message = translateErrorMessage(err);
         status.errorMessage = err.message;
         lastError = err;
-        if (isScheduled &&
-            err.code === 409 &&
-            ++status.lockRetries <= SYNC_LOCK_RETRIES) {
-          return;
-        }
         if (isGrantError(err)) {
           status.login = false;
         }
       }
-      status.lockRetries = 0;
       emitStatusChange();
     },
   };
@@ -208,6 +199,9 @@ const syncMan = (() => {
       setState(drive, state) {
         return chromeLocal.setValue(STORAGE_KEY + drive.name, state);
       },
+      retryMaxAttempts: 10,
+      retryExp: 1.2,
+      retryDelay: 6,
     });
   }
 
@@ -257,8 +251,16 @@ const syncMan = (() => {
   function schedule(delay = SYNC_DELAY) {
     chrome.alarms.create('syncNow', {
       delayInMinutes: delay, // fractional values are supported
+      periodInMinutes: SYNC_INTERVAL,
     });
   }
 
+  function translateErrorMessage(err) {
+    if (err.name === 'LockError') {
+      return browser.i18n.getMessage('syncErrorLock', new Date(err.expire).toLocaleString([], {timeStyle: 'short'}));
+    }
+    return err.message || String(err);
+  }
+
   //#endregion
 })();
diff --git a/package-lock.json b/package-lock.json
index 66d84cfa..08c78276 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
       "license": "GPL-3.0-only",
       "dependencies": {
         "codemirror": "5.63.3",
-        "db-to-cloud": "^0.6.0",
+        "db-to-cloud": "^0.7.0",
         "jsonlint": "^1.6.3",
         "less-bundle": "github:openstyles/less-bundle#v0.1.0",
         "lz-string-unsafe": "^1.4.4-fork-1",
@@ -2322,9 +2322,9 @@
       }
     },
     "node_modules/db-to-cloud": {
-      "version": "0.6.0",
-      "resolved": "https://registry.npmjs.org/db-to-cloud/-/db-to-cloud-0.6.0.tgz",
-      "integrity": "sha512-AbvxpU+fA3Fsdzu0OxL+cVPS9HwM6DzXFDg00WIQ3YeMkWs5saMXpiXMfISlkpBUwm5Cbr4W7cfhYszu38BzSw==",
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/db-to-cloud/-/db-to-cloud-0.7.0.tgz",
+      "integrity": "sha512-fs3FS6vMLk7E6gnuao9lJqTU+ohy6Pa9fqgZSVnoICMsCfqrnyYj+reA81xOmw9kfqVQNdtu+zZv67IJThrMvA==",
       "dependencies": {
         "@eight04/read-write-lock": "^0.1.0",
         "universal-base64": "^2.1.0"
@@ -11501,9 +11501,9 @@
       }
     },
     "db-to-cloud": {
-      "version": "0.6.0",
-      "resolved": "https://registry.npmjs.org/db-to-cloud/-/db-to-cloud-0.6.0.tgz",
-      "integrity": "sha512-AbvxpU+fA3Fsdzu0OxL+cVPS9HwM6DzXFDg00WIQ3YeMkWs5saMXpiXMfISlkpBUwm5Cbr4W7cfhYszu38BzSw==",
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/db-to-cloud/-/db-to-cloud-0.7.0.tgz",
+      "integrity": "sha512-fs3FS6vMLk7E6gnuao9lJqTU+ohy6Pa9fqgZSVnoICMsCfqrnyYj+reA81xOmw9kfqVQNdtu+zZv67IJThrMvA==",
       "requires": {
         "@eight04/read-write-lock": "^0.1.0",
         "universal-base64": "^2.1.0"
diff --git a/package.json b/package.json
index a87f5efe..d794449a 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "codemirror": "5.63.3",
-    "db-to-cloud": "^0.6.0",
+    "db-to-cloud": "^0.7.0",
     "jsonlint": "^1.6.3",
     "less-bundle": "github:openstyles/less-bundle#v0.1.0",
     "lz-string-unsafe": "^1.4.4-fork-1",
diff --git a/vendor/db-to-cloud/README.md b/vendor/db-to-cloud/README.md
index fed55581..ae4bf563 100644
--- a/vendor/db-to-cloud/README.md
+++ b/vendor/db-to-cloud/README.md
@@ -1,4 +1,4 @@
-## db-to-cloud v0.6.0
+## db-to-cloud v0.7.0
 
 Following files are copied from npm (node_modules):
 
diff --git a/vendor/db-to-cloud/db-to-cloud.min.js b/vendor/db-to-cloud/db-to-cloud.min.js
index 6d46dcfe..a0d4226d 100644
--- a/vendor/db-to-cloud/db-to-cloud.min.js
+++ b/vendor/db-to-cloud/db-to-cloud.min.js
@@ -1,2 +1,2 @@
-var dbToCloud=function(t){"use strict";function e(t,e,n,o,r,i,c){try{var a=t[i](c),s=a.value}catch(t){return void n(t)}a.done?e(s):Promise.resolve(s).then(o,r)}function n(t){return function(){var n=this,o=arguments;return new Promise((function(r,i){var c=t.apply(n,o);function a(t){e(c,r,i,a,s,"next",t)}function s(t){e(c,r,i,a,s,"throw",t)}a(void 0)}))}}function o(t,e,n){return e in t?Object.defineProperty(t,e,{value:n,enumerable:!0,configurable:!0,writable:!0}):t[e]=n,t}function r(t,e){var n=Object.keys(t);if(Object.getOwnPropertySymbols){var o=Object.getOwnPropertySymbols(t);e&&(o=o.filter((function(e){return Object.getOwnPropertyDescriptor(t,e).enumerable}))),n.push.apply(n,o)}return n}function i(t){for(var e=1;e<arguments.length;e++){var n=null!=arguments[e]?arguments[e]:{};e%2?r(Object(n),!0).forEach((function(e){o(t,e,n[e])})):Object.getOwnPropertyDescriptors?Object.defineProperties(t,Object.getOwnPropertyDescriptors(n)):r(Object(n)).forEach((function(e){Object.defineProperty(t,e,Object.getOwnPropertyDescriptor(n,e))}))}return t}function c(t,e){if(null==t)return{};var n,o,r=function(t,e){if(null==t)return{};var n,o,r={},i=Object.keys(t);for(o=0;o<i.length;o++)n=i[o],e.indexOf(n)>=0||(r[n]=t[n]);return r}(t,e);if(Object.getOwnPropertySymbols){var i=Object.getOwnPropertySymbols(t);for(o=0;o<i.length;o++)n=i[o],e.indexOf(n)>=0||Object.prototype.propertyIsEnumerable.call(t,n)&&(r[n]=t[n])}return r}function a(t,e){return function(t){if(Array.isArray(t))return t}(t)||function(t,e){if("undefined"==typeof Symbol||!(Symbol.iterator in Object(t)))return;var n=[],o=!0,r=!1,i=void 0;try{for(var 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