Webapack 2 - It's no longer allowed to omit the '-loader' suffix when using loaders.

I keep getting this error It's no longer allowed to omit the '-loader' suffix when using loaders. when trying either:

      {
        test: /.*\.(gif|png|jpe?g|svg)$/i,
        loaders: [
          'file-loader',
          {
            loader: 'image-webpack-loader',
            query: {
              progressive: true,
              optimizationLevel: 7,
              interlaced: false,
              pngquant: {
                quality: '65-90',
                speed: 4
              }
            }
          }
        ]
      }

or just using loader: 'image-webpack-loader',