Can't build with gradle

[BitBoxGaming]

After adding

dependencies { compile 'com.afollestad:icon-request:1.3.8' }

The project is unable to build as it "Could not find com.afollestad:icon-request:1.3.8."

Full error log:

`Error:A problem occurred configuring project ':app'.

Could not resolve all dependencies for configuration ':app:_debugCompile'.
Could not find com.afollestad:icon-request:1.3.8.
Searched in the following locations:
file:/C:/Program Files/Android/Android Studio/gradle/m2repository/com/afollestad/icon-request/1.3.8/icon-request-1.3.8.pom
file:/C:/Program Files/Android/Android Studio/gradle/m2repository/com/afollestad/icon-request/1.3.8/icon-request-1.3.8.pom
https://jcenter.bintray.com/com/afollestad/icon-request/1.3.8/icon-request-1.3.8.pom
https://jcenter.bintray.com/com/afollestad/icon-request/1.3.8/icon-request-1.3.8.pom
file:/C:/Users/User 1/AppData/Local/Android/Sdk/extras/android/m2repository/com/afollestad/icon-request/1.3.8/icon-request-1.3.8.pom
file:/C:/Users/User 1/AppData/Local/Android/Sdk/extras/android/m2repository/com/afollestad/icon-request/1.3.8/icon-request-1.3.8.pom
file:/C:/Users/User 1/AppData/Local/Android/Sdk/extras/google/m2repository/com/afollestad/icon-request/1.3.8/icon-request-1.3.8.pom
file:/C:/Users/User 1/AppData/Local/Android/Sdk/extras/google/m2repository/com/afollestad/icon-request/1.3.8/icon-request-1.3.8.pom
Required by:
Android-Navigation-Drawer-master:app:unspecified`

[PDDStudio]

The project is unable to build as it "Could not find com.afollestad:icon-request:1.3.8_."
Is the last ". (DOT)_" supposed to be there?
Also make sure you added the maven repository https://dl.bintray.com/drummer-aidan/maven/to your build file.

[BitBoxGaming]

Wow, I'm an idiot. Thanks!