diff --git a/src/apptask.js b/src/apptask.js
index 82ab8b45a..7681ec813 100644
--- a/src/apptask.js
+++ b/src/apptask.js
@@ -265,7 +265,7 @@ function cleanupLogs(app, callback) {
 
     // note that redis container logs are cleaned up by the addon
     rimraf(path.join(paths.LOG_DIR, app.id), function (error) {
-        if (error) debugApp(app, 'cannot cleanup logs: %s', error);
+        if (error) debugApp(app, 'cannot cleanup logs:', error);
 
         callback(null);
     });
@@ -291,9 +291,9 @@ function downloadIcon(app, callback) {
     // nothing to download if we dont have an appStoreId
     if (!app.appStoreId) return callback(null);
 
-    debugApp(app, 'Downloading icon of %s@%s', app.appStoreId, app.manifest.version);
+    debugApp(app, `Downloading icon of ${app.appStoreId}@${app.manifest.version}`);
 
-    var iconUrl = settings.apiServerOrigin() + '/api/v1/apps/' + app.appStoreId + '/versions/' + app.manifest.version + '/icon';
+    const iconUrl = settings.apiServerOrigin() + '/api/v1/apps/' + app.appStoreId + '/versions/' + app.manifest.version + '/icon';
 
     async.retry({ times: 10, interval: 5000 }, function (retryCallback) {
         superagent
@@ -498,7 +498,7 @@ function install(app, args, progressCallback, callback) {
         updateApp.bind(null, app, { installationState: apps.ISTATE_INSTALLED, error: null, health: null })
     ], function seriesDone(error) {
         if (error) {
-            debugApp(app, 'error installing app: %s', error);
+            debugApp(app, 'error installing app:', error);
             return updateApp(app, { installationState: apps.ISTATE_ERROR, error: makeTaskError(error, app) }, callback.bind(null, error));
         }
         callback(null);
@@ -521,7 +521,7 @@ function backup(app, args, progressCallback, callback) {
         updateApp.bind(null, app, { installationState: apps.ISTATE_INSTALLED, error: null })
     ], function seriesDone(error) {
         if (error) {
-            debugApp(app, 'error backing up app: %s', error);
+            debugApp(app, 'error backing up app:', error);
             // return to installed state intentionally. the error is stashed only in the task and not the app (the UI shows error state otherwise)
             return updateApp(app, { installationState: apps.ISTATE_INSTALLED, error: null }, callback.bind(null, makeTaskError(error, app)));
         }
@@ -552,7 +552,7 @@ function create(app, args, progressCallback, callback) {
         updateApp.bind(null, app, { installationState: apps.ISTATE_INSTALLED, error: null, health: null })
     ], function seriesDone(error) {
         if (error) {
-            debugApp(app, 'error creating : %s', error);
+            debugApp(app, 'error creating :', error);
             return updateApp(app, { installationState: apps.ISTATE_ERROR, error: makeTaskError(error, app) }, callback.bind(null, error));
         }
         callback(null);
@@ -626,7 +626,7 @@ function changeLocation(app, args, progressCallback, callback) {
         updateApp.bind(null, app, { installationState: apps.ISTATE_INSTALLED, error: null, health: null })
     ], function seriesDone(error) {
         if (error) {
-            debugApp(app, 'error changing location : %s', error);
+            debugApp(app, 'error changing location:', error);
             return updateApp(app, { installationState: apps.ISTATE_ERROR, error: makeTaskError(error, app) }, callback.bind(null, error));
         }
         callback(null);
@@ -665,7 +665,7 @@ function migrateDataDir(app, args, progressCallback, callback) {
         updateApp.bind(null, app, { installationState: apps.ISTATE_INSTALLED, error: null, health: null, dataDir: newDataDir })
     ], function seriesDone(error) {
         if (error) {
-            debugApp(app, 'error migrating data dir : %s', error);
+            debugApp(app, 'error migrating data dir:', error);
             return updateApp(app, { installationState: apps.ISTATE_ERROR, error: makeTaskError(error, app) }, callback.bind(null, error));
         }
 
@@ -710,7 +710,7 @@ function configure(app, args, progressCallback, callback) {
         updateApp.bind(null, app, { installationState: apps.ISTATE_INSTALLED, error: null, health: null })
     ], function seriesDone(error) {
         if (error) {
-            debugApp(app, 'error reconfiguring : %s', error);
+            debugApp(app, 'error reconfiguring:', error);
             return updateApp(app, { installationState: apps.ISTATE_ERROR, error: makeTaskError(error, app) }, callback.bind(null, error));
         }
 
@@ -821,7 +821,7 @@ function update(app, args, progressCallback, callback) {
             debugApp(app, 'update aborted because backup failed', error);
             updateApp(app, { installationState: apps.ISTATE_INSTALLED, error: null, health: null }, callback.bind(null, error));
         } else if (error) {
-            debugApp(app, 'Error updating app: %s', error);
+            debugApp(app, 'Error updating app:', error);
             updateApp(app, { installationState: apps.ISTATE_ERROR, error: makeTaskError(error, app) }, callback.bind(null, error));
         } else {
             callback(null);
@@ -853,7 +853,7 @@ function start(app, args, progressCallback, callback) {
         updateApp.bind(null, app, { installationState: apps.ISTATE_INSTALLED, error: null, health: null })
     ], function seriesDone(error) {
         if (error) {
-            debugApp(app, 'error starting app: %s', error);
+            debugApp(app, 'error starting app:', error);
             return updateApp(app, { installationState: apps.ISTATE_ERROR, error: makeTaskError(error, app) }, callback.bind(null, error));
         }
         callback(null);
@@ -880,7 +880,7 @@ function stop(app, args, progressCallback, callback) {
         updateApp.bind(null, app, { installationState: apps.ISTATE_INSTALLED, error: null, health: null })
     ], function seriesDone(error) {
         if (error) {
-            debugApp(app, 'error starting app: %s', error);
+            debugApp(app, 'error starting app:', error);
             return updateApp(app, { installationState: apps.ISTATE_ERROR, error: makeTaskError(error, app) }, callback.bind(null, error));
         }
         callback(null);
@@ -901,7 +901,7 @@ function restart(app, args, progressCallback, callback) {
         updateApp.bind(null, app, { installationState: apps.ISTATE_INSTALLED, error: null, health: null })
     ], function seriesDone(error) {
         if (error) {
-            debugApp(app, 'error starting app: %s', error);
+            debugApp(app, 'error starting app:', error);
             return updateApp(app, { installationState: apps.ISTATE_ERROR, error: makeTaskError(error, app) }, callback.bind(null, error));
         }
         callback(null);
@@ -940,7 +940,7 @@ function uninstall(app, args, progressCallback, callback) {
         appdb.del.bind(null, app.id)
     ], function seriesDone(error) {
         if (error) {
-            debugApp(app, 'error uninstalling app: %s', error);
+            debugApp(app, 'error uninstalling app:', error);
             return updateApp(app, { installationState: apps.ISTATE_ERROR, error: makeTaskError(error, app) }, callback.bind(null, error));
         }
         callback(null);
@@ -957,7 +957,7 @@ function run(appId, args, progressCallback, callback) {
     apps.get(appId, function (error, app) {
         if (error) return callback(error);
 
-        debugApp(app, 'startTask installationState: %s runState: %s', app.installationState, app.runState);
+        debugApp(app, `startTask installationState: ${app.installationState} runState: ${app.runState}`);
 
         switch (app.installationState) {
         case apps.ISTATE_PENDING_INSTALL:
diff --git a/src/services.js b/src/services.js
index 7940c01c3..b7a6da06e 100644
--- a/src/services.js
+++ b/src/services.js
@@ -1993,7 +1993,7 @@ function teardownRedis(app, options, callback) {
             if (error) return callback(new BoxError(BoxError.FS_ERROR, `Error removing redis data: ${error.message}`));
 
             rimraf(path.join(paths.LOG_DIR, `redis-${app.id}`), function (error) {
-                if (error) debugApp(app, 'cannot cleanup logs: %s', error);
+                if (error) debugApp(app, 'cannot cleanup logs:', error);
 
                 appdb.unsetAddonConfig(app.id, 'redis', callback);
             });