diff --git a/composer.json b/composer.json
index a3407d7fa20..86acd2f8d60 100644
--- a/composer.json
+++ b/composer.json
@@ -24,10 +24,10 @@
 		"vendor-dir" : "htdocs/includes"
 	},
 	"require" : {
-		"php" : ">=5.3.0",
+		"php" : ">=5.5.0",
 		"ext-curl" : "*",
 		"ckeditor/ckeditor" : "4.12.1",
-		"mike42/escpos-php" : "1.2.1",
+		"mike42/escpos-php" : "2.2",
 		"mobiledetect/mobiledetectlib" : "2.8.33",
 		"phpoffice/phpexcel" : "1.8.1",
 		"restler/framework" : "3.0.0-RC6",
@@ -48,13 +48,12 @@
 		"ext-mssql" : "To use with MSSQL (experimental)",
 		"ext-pdo_sqlite" : "To use with SQLite (experimental)",
 		"ext-gd" : "Image manipulation (Required but maybe built-in PHP)",
-		"ext-imagick" : "Image manipulation (TCPDF)",
+		"ext-imagick" : "Generation of thumbs from PDF",
 		"ext-mcrypt" : "(Required but maybe built-in PHP)",
 		"ext-openssl" : "Secure connections (Emails, SOAP\u2026)",
-		"ext-mbstring" : "Handle non UTF-8 databases",
+		"ext-mbstring" : "Handle non UTF-8 characters",
 		"ext-soap" : "Native SOAP",
-		"ext-zip" : "ODT and Excel support",
-		"ext-xml" : "Excel support",
-		"firephp/firephp-core" : "Logging to Firebug console support"
+		"ext-zip" : "ODT, Excel and file compression support",
+		"ext-xml" : "Excel support"
 	}
 }
\ No newline at end of file