Why does webpack try to parse my readme.md files

Webpack throws errors shown below. The build seems to work, still, what gives?

WARNING in ./{snip}/readme.md Module parse failed: C:{snip}\readme.md Unexpected token (1:7) You may need an appropriate loader to handle this file type.

I could not find any way to ignore files. I don't even know why it is trying to render those files.

Here are some parts of my webpack settings file:

module: {
    loaders: [
        {test: /\.hb.html$/, loader: "handlebars-loader/?helperDirs[]=" + __dirname + "/src/handlebarsHelpers"},
        { test: /\.tsx?$/, loader: "ts-loader?" + JSON.stringify({
            transpileOnly: true
        })}
    ]
},

Entry:

entry: "./src/entry.ts",

and

resolve: {
    extensions: ["", ".webpack.js", ".web.js", ".ts", ".tsx", ".js"],

I tried excluding .md files in typescript config file, also didn't work.