diff --git a/src/Composer/Json/JsonManipulator.php b/src/Composer/Json/JsonManipulator.php
index b25a0e63b..ecb15878b 100644
--- a/src/Composer/Json/JsonManipulator.php
+++ b/src/Composer/Json/JsonManipulator.php
@@ -20,12 +20,12 @@ use Composer\Repository\PlatformRepository;
 class JsonManipulator
 {
     private static $DEFINES = '(?(DEFINE)
-       (?<number>    -? (?= [1-9]|0(?!\d) ) \d++ (\.\d++)? ([eE] [+-]? \d++)? )
+       (?<number>    -? (?= [1-9]|0(?!\d) ) \d++ (\.\d++)? ([eE] [+-]?+ \d++)? )
        (?<boolean>   true | false | null )
        (?<string>    " ([^"\\\\]*+ | \\\\ ["\\\\bfnrt\/] | \\\\ u [0-9A-Fa-f]{4} )* " )
-       (?<array>     \[  (?:  (?&json) \s*+ (?: , (?&json) \s*+ )*+  )?  \s*+ \] )
+       (?<array>     \[  (?:  (?&json) \s*+ (?: , (?&json) \s*+ )*+  )?+  \s*+ \] )
        (?<pair>      \s*+ (?&string) \s*+ : (?&json) \s*+ )
-       (?<object>    \{  (?:  (?&pair)  (?: , (?&pair)  )*+  )?  \s*+ \} )
+       (?<object>    \{  (?:  (?&pair)  (?: , (?&pair)  )*+  )?+  \s*+ \} )
        (?<json>      \s*+ (?: (?&number) | (?&boolean) | (?&string) | (?&array) | (?&object) ) )
     )';