Allowing an Insecure Protocol for accessing repository via HTTP

Recently, Gradle started complaining about an insecure protocol for my maven repositories configured in build.gradle.

repositories {
    mavenCentral()
    maven {
        url "http://nexus..."
    }
}

I realized that I can’t change the protocol of the server and I put allowInsecureProtocol true to the configuration.

repositories {
    mavenCentral()
    maven {
        url "http://nexus..."
        allowInsecureProtocol true
    }
}