diff --git a/luci-app-zapret/htdocs/luci-static/resources/view/zapret/service.js b/luci-app-zapret/htdocs/luci-static/resources/view/zapret/service.js
index d7d6c0f..f82f049 100644
--- a/luci-app-zapret/htdocs/luci-static/resources/view/zapret/service.js
+++ b/luci-app-zapret/htdocs/luci-static/resources/view/zapret/service.js
@@ -50,7 +50,7 @@ return view.extend({
             fs.exec(tools.execPath, [ 'enabled' ]), // svc_en
             tools.getSvcInfo(),                     // svc_info
             fs.exec('/bin/busybox', [ 'ps' ]),      // process list
-            fs.exec(tools.packager.path, tools.packager.args),  // installed packages
+            tools.getPackageDict(),                 // installed packages
             tools.getStratList(),                   // nfqws strategy list
             fs.exec('/bin/cat', [ '/etc/openwrt_release' ]),  // CPU arch
             uci.load(tools.appName),              // config
@@ -75,7 +75,7 @@ return view.extend({
         let svc_en    = status_array[1];   // stdout: empty or error text
         let svc_info  = status_array[2];   // stdout: JSON as text
         let proc_list = status_array[3];   // stdout: multiline text
-        let pkg_list  = status_array[4];   // stdout: installed packages
+        let pkg_dict  = status_array[4];   // stdout: installed packages
         let stratlist = status_array[5];   // array of strat names
         let sys_info  = status_array[6];   // stdout: openwrt distrib info
         
@@ -95,8 +95,8 @@ return view.extend({
             this.disableButtons(true, -1, elems);
             return;
         }
-        if (pkg_list.code != 0) {
-            ui.addNotification(null, E('p', _('Unable to enumerate installed packages') + ': setAppStatus()'));
+        if (!pkg_dict) {
+            ui.addNotification(null, E('p', _('Unable to enumerate installed packages') + ': getPackageDict()'));
             this.disableButtons(true, -1, elems);
             return;
         }
@@ -342,9 +342,9 @@ return view.extend({
         }
         let cfg = uci.get(tools.appName, 'config');
 
-        let pkg_list = status_array[4];
-        if (pkg_list === undefined || typeof(pkg_list) !== 'object' || pkg_list.code != 0) {
-            ui.addNotification(null, E('p', _('Unable to enumerate installed packages') + ': setAppStatus()'));
+        let pkgdict = status_array[4];
+        if (pkgdict == null) {
+            ui.addNotification(null, E('p', _('Unable to enumerate installed packages') + ': render()'));
             return;
         }
 
@@ -431,12 +431,12 @@ return view.extend({
         poll.add(L.bind(this.statusPoll, this));
 
         let page_title = tools.AppName;
-        let pkgdict = tools.decode_pkg_list(pkg_list.stdout, false);
         page_title += ' &nbsp ';
         if (pkgdict[tools.appName] === undefined || pkgdict[tools.appName] == '') {
             page_title += 'unknown version';
         } else {
             page_title += 'v' + pkgdict[tools.appName];
+            page_title = page_title.replace(/-r1$/, '');
         }
         let aux1 = E('em');
         let aux2 = E('em');
diff --git a/luci-app-zapret/htdocs/luci-static/resources/view/zapret/tools.js b/luci-app-zapret/htdocs/luci-static/resources/view/zapret/tools.js
index 5ddd637..b844d34 100644
--- a/luci-app-zapret/htdocs/luci-static/resources/view/zapret/tools.js
+++ b/luci-app-zapret/htdocs/luci-static/resources/view/zapret/tools.js
@@ -101,6 +101,30 @@ return baseclass.extend({
         });
     },
 
+    getPackageDict: function()
+    {
+        let ses_var_name = this.appName+'_pkgdict';
+        let exec_cmd = this.packager.path;
+        let exec_arg = this.packager.args;
+        return fs.exec(exec_cmd, exec_arg).then(res => {
+            let pdict_json = sessionStorage.getItem(ses_var_name);
+            if (res.code != 0) {
+                console.log(this.appName + ': Unable to enumerate installed packages. code = ' + res.code);
+                if (pdict_json != null) {
+                    return JSON.parse(pdict_json);  // return cached value
+                }
+                return null;
+            }
+            let pdict = this.decode_pkg_list(res.stdout);
+            if (pdict != pdict_json) {
+                sessionStorage.setItem(ses_var_name, JSON.stringify(pdict));  // renew cache
+            }
+            return pdict;
+        }).catch(e => {
+            ui.addNotification(null, E('p', _('Unable to enumerate installed packages.') + ' Error: %s'.format(e)));
+        });
+    },
+
     getStratList: function() {
         let exec_cmd = '/bin/busybox';
         let exec_arg = [ 'awk', '-F', '"', '/if \\[ "\\$strat" = "/ {print $4}', this.defCfgPath ];
@@ -141,7 +165,7 @@ return baseclass.extend({
         return m ? m[2] : defval;        
     },
 
-    decode_pkg_list: function(pkg_list, with_suffix_r1 = true) {
+    decode_pkg_list: function(pkg_list) {
         let pkg_dict = { };
         if (!pkg_list) {
             return pkg_dict;
@@ -180,11 +204,7 @@ return baseclass.extend({
                 }
             }
             if (rev >= 0) {
-                if (rev == 1 && !with_suffix_r1) {
-                    // nothing
-                } else {
-                    ver += '-r' + rev;
-                }
+                ver += '-r' + rev;
             }
             pkg_dict[name] = ver;
         }