diff --git a/.travis.yml b/.travis.yml
index 265ad9a..b7b86a3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ install:
   # Get Migen / LiteX / Cores
   - wget https://raw.githubusercontent.com/enjoy-digital/litex/master/litex_setup.py
   - python3 litex_setup.py init install
+  - python3 -m pip install pyyaml
 
 before_script:
   # Get RISC-V toolchain