Как подключать внешние шрифты при сжатии CSS?

/* exo-2-300 - latin_cyrillic */
@font-face {
  font-family: 'Exo 2';
  font-style: normal;
  font-weight: 300;
  src: url('../fonts/exo-2-v5-latin_cyrillic-300.eot'); /* IE9 Compat Modes */
  src: local('Exo 2 Light'), local('Exo2-Light'),
       url('../fonts/exo-2-v5-latin_cyrillic-300.eot?#iefix') format('embedded-opentype'), /* IE6-IE8 */
       url('../fonts/exo-2-v5-latin_cyrillic-300.woff2') format('woff2'), /* Super Modern Browsers */
       url('../fonts/exo-2-v5-latin_cyrillic-300.woff') format('woff'), /* Modern Browsers */
       url('../fonts/exo-2-v5-latin_cyrillic-300.ttf') format('truetype'), /* Safari, Android, iOS */
       url('../fonts/exo-2-v5-latin_cyrillic-300.svg#Exo2') format('svg'); /* Legacy iOS */
}
/* exo-2-regular - latin_cyrillic */
@font-face {
  font-family: 'Exo 2';
  font-style: normal;
  font-weight: 400;
  src: url('../fonts/exo-2-v5-latin_cyrillic-regular.eot'); /* IE9 Compat Modes */
  src: local('Exo 2'), local('Exo2-Regular'),
       url('../fonts/exo-2-v5-latin_cyrillic-regular.eot?#iefix') format('embedded-opentype'), /* IE6-IE8 */
       url('../fonts/exo-2-v5-latin_cyrillic-regular.woff2') format('woff2'), /* Super Modern Browsers */
       url('../fonts/exo-2-v5-latin_cyrillic-regular.woff') format('woff'), /* Modern Browsers */
       url('../fonts/exo-2-v5-latin_cyrillic-regular.ttf') format('truetype'), /* Safari, Android, iOS */
       url('../fonts/exo-2-v5-latin_cyrillic-regular.svg#Exo2') format('svg'); /* Legacy iOS */
}
/* exo-2-700 - latin_cyrillic */
@font-face {
  font-family: 'Exo 2';
  font-style: normal;
  font-weight: 700;
  src: url('../fonts/exo-2-v5-latin_cyrillic-700.eot'); /* IE9 Compat Modes */
  src: local('Exo 2 Bold'), local('Exo2-Bold'),
       url('../fonts/exo-2-v5-latin_cyrillic-700.eot?#iefix') format('embedded-opentype'), /* IE6-IE8 */
       url('../fonts/exo-2-v5-latin_cyrillic-700.woff2') format('woff2'), /* Super Modern Browsers */
       url('../fonts/exo-2-v5-latin_cyrillic-700.woff') format('woff'), /* Modern Browsers */
       url('../fonts/exo-2-v5-latin_cyrillic-700.ttf') format('truetype'), /* Safari, Android, iOS */
       url('../fonts/exo-2-v5-latin_cyrillic-700.svg#Exo2') format('svg'); /* Legacy iOS */
}