diff --git a/lib/Predis/Commands/HashDeleteV24x.php b/lib/Predis/Commands/HashDeleteV24x.php
index 93103290..4b757d51 100644
--- a/lib/Predis/Commands/HashDeleteV24x.php
+++ b/lib/Predis/Commands/HashDeleteV24x.php
@@ -9,7 +9,7 @@ class HashDeleteV24x extends Command {
         return 'HDEL';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         return Helpers::filterVariadicValues($arguments);
     }
 
diff --git a/lib/Predis/Commands/HashGetMultiple.php b/lib/Predis/Commands/HashGetMultiple.php
index 0cea1c17..44d2a424 100644
--- a/lib/Predis/Commands/HashGetMultiple.php
+++ b/lib/Predis/Commands/HashGetMultiple.php
@@ -7,7 +7,7 @@ class HashGetMultiple extends Command {
         return 'HMGET';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         if (count($arguments) === 2 && is_array($arguments[1])) {
             $flattenedKVs = array($arguments[0]);
             $args = $arguments[1];
diff --git a/lib/Predis/Commands/HashSetMultiple.php b/lib/Predis/Commands/HashSetMultiple.php
index aaf75b61..bf1d1793 100644
--- a/lib/Predis/Commands/HashSetMultiple.php
+++ b/lib/Predis/Commands/HashSetMultiple.php
@@ -7,7 +7,7 @@ class HashSetMultiple extends Command {
         return 'HMSET';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         if (count($arguments) === 2 && is_array($arguments[1])) {
             $flattenedKVs = array($arguments[0]);
             $args = $arguments[1];
diff --git a/lib/Predis/Commands/KeyDelete.php b/lib/Predis/Commands/KeyDelete.php
index 12246291..152782d6 100644
--- a/lib/Predis/Commands/KeyDelete.php
+++ b/lib/Predis/Commands/KeyDelete.php
@@ -9,7 +9,7 @@ class KeyDelete extends Command {
         return 'DEL';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         return Helpers::filterArrayArguments($arguments);
     }
 
diff --git a/lib/Predis/Commands/KeySort.php b/lib/Predis/Commands/KeySort.php
index b5e65d9a..cbad4a77 100644
--- a/lib/Predis/Commands/KeySort.php
+++ b/lib/Predis/Commands/KeySort.php
@@ -7,7 +7,7 @@ class KeySort extends Command {
         return 'SORT';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         if (count($arguments) === 1) {
             return $arguments;
         }
diff --git a/lib/Predis/Commands/ListPushTailV24x.php b/lib/Predis/Commands/ListPushTailV24x.php
index 9f7e960d..f4d2454b 100644
--- a/lib/Predis/Commands/ListPushTailV24x.php
+++ b/lib/Predis/Commands/ListPushTailV24x.php
@@ -9,7 +9,7 @@ class ListPushTailV24x extends Command {
         return 'RPUSH';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         return Helpers::filterVariadicValues($arguments);
     }
 }
diff --git a/lib/Predis/Commands/PubSubSubscribe.php b/lib/Predis/Commands/PubSubSubscribe.php
index e1abc479..67c04adb 100644
--- a/lib/Predis/Commands/PubSubSubscribe.php
+++ b/lib/Predis/Commands/PubSubSubscribe.php
@@ -9,7 +9,7 @@ class PubSubSubscribe extends Command {
         return 'SUBSCRIBE';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         return Helpers::filterArrayArguments($arguments);
     }
 
diff --git a/lib/Predis/Commands/ServerSlaveOf.php b/lib/Predis/Commands/ServerSlaveOf.php
index 53628810..aed87b0f 100644
--- a/lib/Predis/Commands/ServerSlaveOf.php
+++ b/lib/Predis/Commands/ServerSlaveOf.php
@@ -7,7 +7,7 @@ class ServerSlaveOf extends Command {
         return 'SLAVEOF';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         if (count($arguments) === 0 || $arguments[0] === 'NO ONE') {
             return array('NO', 'ONE');
         }
diff --git a/lib/Predis/Commands/SetAddV24x.php b/lib/Predis/Commands/SetAddV24x.php
index 7a58bd68..b130a4d0 100644
--- a/lib/Predis/Commands/SetAddV24x.php
+++ b/lib/Predis/Commands/SetAddV24x.php
@@ -9,7 +9,7 @@ class SetAddV24x extends Command {
         return 'SADD';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         return Helpers::filterVariadicValues($arguments);
     }
 
diff --git a/lib/Predis/Commands/SetIntersection.php b/lib/Predis/Commands/SetIntersection.php
index 1cccf9a4..10414e5a 100644
--- a/lib/Predis/Commands/SetIntersection.php
+++ b/lib/Predis/Commands/SetIntersection.php
@@ -9,7 +9,7 @@ class SetIntersection extends Command {
         return 'SINTER';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         return Helpers::filterArrayArguments($arguments);
     }
 
diff --git a/lib/Predis/Commands/SetIntersectionStore.php b/lib/Predis/Commands/SetIntersectionStore.php
index a761dbee..1ba38a76 100644
--- a/lib/Predis/Commands/SetIntersectionStore.php
+++ b/lib/Predis/Commands/SetIntersectionStore.php
@@ -7,7 +7,7 @@ class SetIntersectionStore extends Command {
         return 'SINTERSTORE';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         if (count($arguments) === 2 && is_array($arguments[1])) {
             return array_merge(array($arguments[0]), $arguments[1]);
         }
diff --git a/lib/Predis/Commands/SetRemoveV24x.php b/lib/Predis/Commands/SetRemoveV24x.php
index 5936dd62..b58bf307 100644
--- a/lib/Predis/Commands/SetRemoveV24x.php
+++ b/lib/Predis/Commands/SetRemoveV24x.php
@@ -9,7 +9,7 @@ class SetRemoveV24x extends Command {
         return 'SREM';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         return Helpers::filterVariadicValues($arguments);
     }
 
diff --git a/lib/Predis/Commands/StringGetMultiple.php b/lib/Predis/Commands/StringGetMultiple.php
index dbac7da4..7771dabe 100644
--- a/lib/Predis/Commands/StringGetMultiple.php
+++ b/lib/Predis/Commands/StringGetMultiple.php
@@ -9,7 +9,7 @@ class StringGetMultiple extends Command {
         return 'MGET';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         return Helpers::filterArrayArguments($arguments);
     }
 
diff --git a/lib/Predis/Commands/StringSetMultiple.php b/lib/Predis/Commands/StringSetMultiple.php
index 54163238..c5cb53ad 100644
--- a/lib/Predis/Commands/StringSetMultiple.php
+++ b/lib/Predis/Commands/StringSetMultiple.php
@@ -7,7 +7,7 @@ class StringSetMultiple extends Command {
         return 'MSET';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         if (count($arguments) === 1 && is_array($arguments[0])) {
             $flattenedKVs = array();
             $args = $arguments[0];
diff --git a/lib/Predis/Commands/TransactionWatch.php b/lib/Predis/Commands/TransactionWatch.php
index 8adc8688..d3cf3164 100644
--- a/lib/Predis/Commands/TransactionWatch.php
+++ b/lib/Predis/Commands/TransactionWatch.php
@@ -7,7 +7,7 @@ class TransactionWatch extends Command {
         return 'WATCH';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         if (isset($arguments[0]) && is_array($arguments[0])) {
             return $arguments[0];
         }
diff --git a/lib/Predis/Commands/ZSetRange.php b/lib/Predis/Commands/ZSetRange.php
index 73bb1ef0..964e3839 100644
--- a/lib/Predis/Commands/ZSetRange.php
+++ b/lib/Predis/Commands/ZSetRange.php
@@ -9,7 +9,7 @@ class ZSetRange extends Command {
         return 'ZRANGE';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         if (count($arguments) === 4) {
             $lastType = gettype($arguments[3]);
             if ($lastType === 'string' && strtolower($arguments[3]) === 'withscores') {
diff --git a/lib/Predis/Commands/ZSetUnionStore.php b/lib/Predis/Commands/ZSetUnionStore.php
index 7797ff9f..8fa45ab7 100644
--- a/lib/Predis/Commands/ZSetUnionStore.php
+++ b/lib/Predis/Commands/ZSetUnionStore.php
@@ -7,7 +7,7 @@ class ZSetUnionStore extends Command {
         return 'ZUNIONSTORE';
     }
 
-    public function filterArguments(Array $arguments) {
+    protected function filterArguments(Array $arguments) {
         $options = array();
         $argc = count($arguments);
         if ($argc > 2 && is_array($arguments[$argc - 1])) {