diff --git a/csaf_2.1/json_schema/csaf_json_schema.json b/csaf_2.1/json_schema/csaf_json_schema.json
index 1c518685..cd5c5d92 100644
--- a/csaf_2.1/json_schema/csaf_json_schema.json
+++ b/csaf_2.1/json_schema/csaf_json_schema.json
@@ -159,7 +159,7 @@
               "title": "Common Platform Enumeration representation",
               "description": "The Common Platform Enumeration (CPE) attribute refers to a method for naming platforms external to this specification.",
               "type": "string",
-              "pattern": "^(cpe:2\\.3:[aho\\*\\-](:(((\\?*|\\*?)([a-zA-Z0-9\\-\\._]|(\\\\[\\\\\\*\\?!\"#\\$%&'\\(\\)\\+,/:;<=>@\\[\\]\\^`\\{\\|\\}~]))+(\\?*|\\*?))|[\\*\\-])){5}(:(([a-zA-Z]{2,3}(-([a-zA-Z]{2}|[0-9]{3}))?)|[\\*\\-]))(:(((\\?*|\\*?)([a-zA-Z0-9\\-\\._]|(\\\\[\\\\\\*\\?!\"#\\$%&'\\(\\)\\+,/:;<=>@\\[\\]\\^`\\{\\|\\}~]))+(\\?*|\\*?))|[\\*\\-])){4})|([c][pP][eE]:/[AHOaho]?(:[A-Za-z0-9\\._\\-~%]*){0,6})$",
+              "pattern": "^(cpe:2\\.3:[aho\\*\\-](:(((\\?*|\\*?)([a-zA-Z0-9\\-\\._]|(\\\\[\\\\\\*\\?!\"#\\$%&'\\(\\)\\+,\\/:;<=>@\\[\\]\\^`\\{\\|\\}~]))+(\\?*|\\*?))|[\\*\\-])){5}(:(([a-zA-Z]{2,3}(-([a-zA-Z]{2}|[0-9]{3}))?)|[\\*\\-]))(:(((\\?*|\\*?)([a-zA-Z0-9\\-\\._]|(\\\\[\\\\\\*\\?!\"#\\$%&'\\(\\)\\+,\\/:;<=>@\\[\\]\\^`\\{\\|\\}~]))+(\\?*|\\*?))|[\\*\\-])){4})|([c][pP][eE]:\\/[AHOaho]?(:[A-Za-z0-9\\._\\-~%]*){0,6})$",
               "minLength": 5
             },
             "hashes": {
@@ -251,7 +251,7 @@
               "description": "The package URL (purl) attribute refers to a method for reliably identifying and locating software packages external to this specification.",
               "type": "string",
               "format": "uri",
-              "pattern": "^pkg:[A-Za-z\\.\\-\\+][A-Za-z0-9\\.\\-\\+]*/.+",
+              "pattern": "^pkg:[A-Za-z\\.\\-\\+][A-Za-z0-9\\.\\-\\+]*\\/.+",
               "minLength": 7
             },
             "sbom_urls": {