diff --git a/composer.json b/composer.json
new file mode 100644
index 000000000..45139927c
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,179 @@
+{
+    "name": "roundcube/roundcubemail",
+    "description": "The Roundcube Webmail suite",
+    "license": "GPL-3.0+",
+    "repositories": [
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/kolab_activesync",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/kolab_addressbook",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/kolab_auth",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/kolab_config",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/kolab_delegation",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/kolab_files",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/kolab_folders",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/kolab_notes",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/kolab_tags",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/kolab_chat",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/odfviewer",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/pdfviewer",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/tasklist",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/calendar",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/libcalendaring",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "path",
+            "url": "/home/mollekopf/src/roundcubemail-plugins-kolab-latest/plugins/libkolab",
+            "options": {
+                "symlink": false
+            }
+        },
+        {
+            "type": "composer",
+            "url": "https://plugins.roundcube.net"
+        }
+    ],
+    "require": {
+        "php": ">=7.2.0",
+        "pear/pear-core-minimal": "~1.10.1",
+        "pear/auth_sasl": "~1.1.0",
+        "pear/mail_mime": "~1.10.0",
+        "pear/http_request2": "~2.5.0",
+        "pear/net_smtp": "~1.10.0",
+        "pear/crypt_gpg": "~1.6.3",
+        "pear/net_sieve": "~1.4.5",
+        "roundcube/plugin-installer": "~0.3.0",
+        "roundcube/rtf-html-php": "~2.1",
+        "masterminds/html5": "~2.7.0",
+        "endroid/qr-code": "~1.6.5",
+        "guzzlehttp/guzzle": "^7.4.1",
+        "kolab/calendar": "~3.5.11",
+        "kolab/kolab_activesync": "~3.5.6",
+        "kolab/kolab_addressbook": "~3.5.6",
+        "kolab/kolab_auth": "~3.5.6",
+        "kolab/kolab_chat": "~3.5.2",
+        "kolab/kolab_config": "~3.4.0",
+        "kolab/kolab_delegation": "~3.5.11",
+        "kolab/kolab_files": "~3.5.2",
+        "kolab/kolab_folders": "~3.5.2",
+        "kolab/kolab_notes": "~3.5.5",
+        "kolab/kolab_tags": "~3.5.2",
+        "kolab/net_ldap3": "dev-master",
+        "kolab/odfviewer": "~3.4.0",
+        "kolab/pdfviewer": "~3.4.0",
+        "kolab/tasklist": "~3.5.10",
+        "johndoh/contextmenu": "~3.2.1",
+        "zf1/zend-json": "~1.12.11",
+        "zf1/zend-log": "~1.12.11",
+        "zf1/zend-controller": "~1.12.11",
+        "sabre/vobject" : "~4.5.1",
+        "sabre/dav" : "~4.0",
+        "sabre/http" : "~5.0",
+        "smarty/smarty" : "~3.1.7"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^4.8.36 || ^5.7.21",
+        "phpstan/phpstan": "^1.4",
+        "squizlabs/php_codesniffer": "^3.6",
+        "phpcompatibility/php-compatibility": "^9.3"
+    },
+    "suggest": {
+        "kolab/net_ldap3": "~1.1.1 required for connecting to LDAP",
+        "mkopinsky/zxcvbn-php": "^4.4.2 required for Zxcvbn password strength driver"
+    }
+}
+