diff --git a/.travis.yml b/.travis.yml
index bf7e9331..22adfdd3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 language: rust
-# cache: cargo # linking failed with cache due to memory exhaustion. why?
+sudo: required # so we get a VM with higher specs
+cache: cargo
 rust:
   - nightly
 script: ./scripts/test.sh