Fatal error running with docker

[malteo]

I'm running docker.io/swaggerapi/swagger-validator:v1.0.7 and since last friday every request fails with

com.github.fge.jsonschema.core.exceptions.ProcessingException: fatal: unable to dereference URI "http://swagger.io/v2/schema.json#"
    level: "fatal"
    uri: "http://swagger.io/v2/schema.json#"
    exceptionMessage: "Server returned HTTP response code: 403 for URL: http://swagger.io/v2/schema.json#"