diff --git a/CHANGELOG.md b/CHANGELOG.md
index c06fb09..914b470 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,9 +8,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### v3.9.x - [Unreleased]
 
-#### Changed
+#### Fixed
 
-- Install ngxblocker with Nginx to set proper values for variables_hash_bucket_size & variables_hash_max_size without conflicts
+- Issue with Nginx variables_hash_bucket_size & variables_hash_max_size
 
 ### v3.11.1 - 2019-12-04
 
diff --git a/wo/cli/plugins/stack_pref.py b/wo/cli/plugins/stack_pref.py
index f6a29d7..8237572 100644
--- a/wo/cli/plugins/stack_pref.py
+++ b/wo/cli/plugins/stack_pref.py
@@ -321,9 +321,15 @@ def post_pref(self, apt_packages, packages, upgrade=False):
                         "'\"$http_referer\" "
                         "\"$http_user_agent\"';\n")
 
-                    # Nginx-Plus does not have nginx
-                    # package structure like this
-                    # So creating directories
+            if not os.path.exists('/etc/nginx/bots.d'):
+                WOFileUtils.textwrite(
+                    self, '/etc/nginx/conf.d/variables-hash.conf',
+                    'variables_hash_max_size 4096;\n'
+                    'variables_hash_bucket_size 4096;')
+
+                # Nginx-Plus does not have nginx
+                # package structure like this
+                # So creating directories
             if not os.path.exists('/etc/nginx/sites-available'):
                 Log.debug(self, 'Creating directory'
                           '/etc/nginx/sites-available')
@@ -1585,11 +1591,16 @@ def post_pref(self, apt_packages, packages, upgrade=False):
         # ngxblocker
         if any('/usr/local/sbin/install-ngxblocker' == x[1]
                for x in packages):
+            # remove duplicate directives
+            if os.path.exists('/etc/nginx/conf.d/variables-hash.conf'):
+                WOFileUtils.rm(self, '/etc/nginx/conf.d/variables-hash.conf')
             WOFileUtils.chmod(
                 self, "/usr/local/sbin/install-ngxblocker", 0o700)
             WOShellExec.cmd_exec(self, '/usr/local/sbin/install-ngxblocker -x')
             WOFileUtils.chmod(
                 self, "/usr/local/sbin/update-ngxblocker", 0o700)
+            if not WOService.restart_service(self, 'nginx'):
+                Log.error(self, 'ngxblocker install failed')
 
 
 def pre_stack(self):
diff --git a/wo/cli/plugins/stack_upgrade.py b/wo/cli/plugins/stack_upgrade.py
index 2d8592c..be669c5 100644
--- a/wo/cli/plugins/stack_upgrade.py
+++ b/wo/cli/plugins/stack_upgrade.py
@@ -269,8 +269,6 @@ class WOStackUpgradeController(CementBaseController):
                     '/usr/local/sbin/update-ngxblocker',
                     'ngxblocker'
                 ]]
-            else:
-                Log.info(self, "ngxblocker is not installed")
 
         if ((not (apt_packages)) and (not(packages))):
             self.app.args.print_help()
@@ -347,6 +345,9 @@ class WOStackUpgradeController(CementBaseController):
                     WOFileUtils.chmod(self, "/usr/local/bin/wp", 0o775)
 
                 if WOAptGet.is_selected(self, 'ngxblocker', packages):
+                    if os.path.exists('/etc/nginx/conf.d/variables-hash.conf'):
+                        WOFileUtils.rm(
+                            self, '/etc/nginx/conf.d/variables-hash.conf')
                     WOFileUtils.chmod(
                         self, '/usr/local/sbin/update-ngxblocker', 0o775)
                     WOShellExec.cmd_exec(