diff --git a/.composer.pman.yml b/.composer.pman.yml
index 6c9491f..7317391 100644
--- a/.composer.pman.yml
+++ b/.composer.pman.yml
@@ -5,8 +5,8 @@ composer:
   dev:
     link: true
     require:
-      nulib/php: ^7.4-dev
+      nulib/base: ^7.4-dev
   dist:
     link: false
     require:
-      nulib/php: ^0.5.0p74
+      nulib/base: ^0.6.0p74
diff --git a/CHANGES.md b/CHANGES.md
index 93bef39..d043827 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,9 @@
+## Release 0.6.0p74 du 30/05/2025-23:18
+
+* `824c1ec` migration de nulib/php à nulib/base
+
+## Release 0.5.0p82 du 30/04/2025-04:48
+
 ## Release 0.5.0p74 du 30/04/2025-04:46
 
 ## Release 0.4.0p82 du 14/03/2025-15:30
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..063aa21
--- /dev/null
+++ b/README.md
@@ -0,0 +1,49 @@
+# nulib-phpss
+
+
+## Release
+
+Exemple: release de la version 0.6.0
+
+Avant de faire une release majeure sur nulib/phpss, faire d'abord la release
+majeure correspondante sur
+* nulib/base
+
+~~~sh
+version=0.6.0
+
+major="${version%.*}.0"
+
+## branche dev74
+git checkout dev74
+
+sed -ri "\
+/nulib\/.*:/s/[0-9]+.[0-9]+.0p74/${major}p74/
+" .composer.pman.yml
+pci "maj projet"
+
+prel -v$version
+
+# en cas de conflit, sélectionner HEAD
+_merge82
+
+## branche dev82
+git checkout dev82
+
+sed -ri "\
+/nulib\/.*:/s/[0-9]+.[0-9]+.0p82/${major}p82/
+" .composer.pman.yml
+pci "maj projet"
+
+prel -C
+
+commit="$(git log --grep="Init changelog . version ${version}p82" --format=%H)" &&
+echo "commit=$commit"
+
+git checkout dev74
+
+git cherry-pick "$commit"
+pp -a
+~~~
+
+-*- coding: utf-8 mode: markdown -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8:noeol:binary
\ No newline at end of file
diff --git a/VERSION.txt b/VERSION.txt
index 8f0916f..a918a2a 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -1 +1 @@
-0.5.0
+0.6.0
diff --git a/composer.json b/composer.json
index 1f566f0..fbe012d 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
 		}
 	},
 	"require": {
-		"nulib/php": "^0.5.0p74",
+		"nulib/base": "^0.6.0p74",
 		"phpoffice/phpspreadsheet": "^1.0",
 		"php": "^7.4"
 	},
diff --git a/composer.lock b/composer.lock
index c8bf112..104f1b5 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "d0d9efbef8093b96775343530927123d",
+    "content-hash": "046a2f42e01b302145e12c79bfb29587",
     "packages": [
         {
             "name": "composer/pcre",
@@ -395,18 +395,21 @@
             "time": "2025-01-14T11:49:03+00:00"
         },
         {
-            "name": "nulib/php",
-            "version": "0.5.0p74",
+            "name": "nulib/base",
+            "version": "0.6.0p74",
             "source": {
                 "type": "git",
-                "url": "https://git.univ-reunion.fr/sda-php/nulib.git",
-                "reference": "4037bf20424eb48708e5fdf9fc8e10f2ef71d134"
+                "url": "https://git.univ-reunion.fr/sda-php/nulib-base.git",
+                "reference": "ea531c41bcb054250b0efc334c6aaa6f77543070"
             },
             "require": {
                 "ext-json": "*",
                 "php": "^7.4",
                 "symfony/yaml": "^5.0"
             },
+            "replace": {
+                "nulib/php": "<0.6.0"
+            },
             "require-dev": {
                 "ext-curl": "*",
                 "ext-pcntl": "*",
@@ -440,7 +443,7 @@
                 }
             ],
             "description": "fonctions et classes essentielles",
-            "time": "2025-04-30T00:32:10+00:00"
+            "time": "2025-05-30T18:35:54+00:00"
         },
         {
             "name": "phpoffice/phpspreadsheet",
@@ -828,7 +831,7 @@
         },
         {
             "name": "symfony/polyfill-ctype",
-            "version": "v1.31.0",
+            "version": "v1.32.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-ctype.git",
@@ -887,7 +890,7 @@
                 "portable"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.31.0"
+                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.32.0"
             },
             "funding": [
                 {
@@ -907,19 +910,20 @@
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.31.0",
+            "version": "v1.32.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "85181ba99b2345b0ef10ce42ecac37612d9fd341"
+                "reference": "6d857f4d76bd4b343eac26d6b539585d2bc56493"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/85181ba99b2345b0ef10ce42ecac37612d9fd341",
-                "reference": "85181ba99b2345b0ef10ce42ecac37612d9fd341",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/6d857f4d76bd4b343eac26d6b539585d2bc56493",
+                "reference": "6d857f4d76bd4b343eac26d6b539585d2bc56493",
                 "shasum": ""
             },
             "require": {
+                "ext-iconv": "*",
                 "php": ">=7.2"
             },
             "provide": {
@@ -967,7 +971,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-mbstring/tree/v1.31.0"
+                "source": "https://github.com/symfony/polyfill-mbstring/tree/v1.32.0"
             },
             "funding": [
                 {
@@ -983,7 +987,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2024-09-09T11:45:10+00:00"
+            "time": "2024-12-23T08:48:59+00:00"
         },
         {
             "name": "symfony/yaml",
@@ -1727,16 +1731,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "9.6.22",
+            "version": "9.6.23",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "f80235cb4d3caa59ae09be3adf1ded27521d1a9c"
+                "reference": "43d2cb18d0675c38bd44982a5d1d88f6d53d8d95"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/f80235cb4d3caa59ae09be3adf1ded27521d1a9c",
-                "reference": "f80235cb4d3caa59ae09be3adf1ded27521d1a9c",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/43d2cb18d0675c38bd44982a5d1d88f6d53d8d95",
+                "reference": "43d2cb18d0675c38bd44982a5d1d88f6d53d8d95",
                 "shasum": ""
             },
             "require": {
@@ -1747,7 +1751,7 @@
                 "ext-mbstring": "*",
                 "ext-xml": "*",
                 "ext-xmlwriter": "*",
-                "myclabs/deep-copy": "^1.12.1",
+                "myclabs/deep-copy": "^1.13.1",
                 "phar-io/manifest": "^2.0.4",
                 "phar-io/version": "^3.2.1",
                 "php": ">=7.3",
@@ -1810,7 +1814,7 @@
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
                 "security": "https://github.com/sebastianbergmann/phpunit/security/policy",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.6.22"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.6.23"
             },
             "funding": [
                 {
@@ -1821,12 +1825,20 @@
                     "url": "https://github.com/sebastianbergmann",
                     "type": "github"
                 },
+                {
+                    "url": "https://liberapay.com/sebastianbergmann",
+                    "type": "liberapay"
+                },
+                {
+                    "url": "https://thanks.dev/u/gh/sebastianbergmann",
+                    "type": "thanks_dev"
+                },
                 {
                     "url": "https://tidelift.com/funding/github/packagist/phpunit/phpunit",
                     "type": "tidelift"
                 }
             ],
-            "time": "2024-12-05T13:48:26+00:00"
+            "time": "2025-05-02T06:40:34+00:00"
         },
         {
             "name": "sebastian/cli-parser",