diff --git a/.travis.yml b/.travis.yml
index c787aa8d9..113daedc0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@ cache:
   directories:
     - $HOME/.cache/pip
 python:
-  - "pypy"
+  - "pypy-5.4.1"
   - "2.7"
   - "3.4"
   - "3.5"
@@ -27,7 +27,7 @@ matrix:
       env: DOCUTILS=0.12
     - python: nightly
       env: DOCUTILS=0.12
-    - python: pypy
+    - python: "pypy-5.4.1"
       env: DOCUTILS=0.12
 addons:
   apt: