diff --git a/sample_feedback.php b/sample_feedback.php
index 52444dba..84894ce6 100644
--- a/sample_feedback.php
+++ b/sample_feedback.php
@@ -31,7 +31,7 @@
 // Instanciate a new ApnsPHP_Feedback object
 $feedback = new ApnsPHP_Feedback(
 	ApnsPHP_Abstract::ENVIRONMENT_SANDBOX,
-	'server_cerificates_bundle_sandbox.pem'
+	'server_certificates_bundle_sandbox.pem'
 );
 
 // Connect to the Apple Push Notification Feedback Service
diff --git a/sample_push.php b/sample_push.php
index 35a249c6..5be3e67c 100644
--- a/sample_push.php
+++ b/sample_push.php
@@ -31,7 +31,7 @@
 // Instanciate a new ApnsPHP_Push object
 $push = new ApnsPHP_Push(
 	ApnsPHP_Abstract::ENVIRONMENT_SANDBOX,
-	'server_cerificates_bundle_sandbox.pem'
+	'server_certificates_bundle_sandbox.pem'
 );
 
 // Set the Root Certificate Autority to verify the Apple remote peer
diff --git a/sample_push_custom.php b/sample_push_custom.php
index 7cd307a1..1ab9ecc3 100644
--- a/sample_push_custom.php
+++ b/sample_push_custom.php
@@ -31,7 +31,7 @@
 // Instanciate a new ApnsPHP_Push object
 $push = new ApnsPHP_Push(
 	ApnsPHP_Abstract::ENVIRONMENT_SANDBOX,
-	'server_cerificates_bundle_sandbox.pem'
+	'server_certificates_bundle_sandbox.pem'
 );
 
 // Set the Root Certificate Autority to verify the Apple remote peer
diff --git a/sample_push_many.php b/sample_push_many.php
index 282eb953..b74225aa 100644
--- a/sample_push_many.php
+++ b/sample_push_many.php
@@ -34,7 +34,7 @@
 // Instanciate a new ApnsPHP_Push object
 $push = new ApnsPHP_Push(
 	ApnsPHP_Abstract::ENVIRONMENT_SANDBOX,
-	'server_cerificates_bundle_sandbox.pem'
+	'server_certificates_bundle_sandbox.pem'
 );
 
 // Set the Root Certificate Autority to verify the Apple remote peer
diff --git a/sample_server.php b/sample_server.php
index 16f067b3..b241bc12 100644
--- a/sample_server.php
+++ b/sample_server.php
@@ -31,7 +31,7 @@
 // Instanciate a new ApnsPHP_Push object
 $server = new ApnsPHP_Push_Server(
 	ApnsPHP_Abstract::ENVIRONMENT_SANDBOX,
-	'server_cerificates_bundle_sandbox.pem'
+	'server_certificates_bundle_sandbox.pem'
 );
 
 // Set the Root Certificate Autority to verify the Apple remote peer