How to force IntelliJ IDEA to reload dependencies from build.sbt after they changed?
Solution 1:
You can force SBT to reload changes: Open SBT toolwindow (on the right side of IDE) and press refresh button.
If you use auto-import feature you need to save your file to force auto-refresh.
Solution 2:
IF plugin gets 'stuck' it helps to invalidate cache (under file menu) and restart intellij.