diff --git a/.travis.yml b/.travis.yml
index 925d09ea..b154277e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -111,7 +111,7 @@ jobs:
 addons:
   apt:
     update: true
-    packages: [ liblzo2-dev, libpam0g-dev, liblz4-dev, linux-libc-dev, man2html, mingw-w64, clang-9, libcmocka-dev ]
+    packages: [ liblzo2-dev, libpam0g-dev, liblz4-dev, linux-libc-dev, man2html, mingw-w64, clang-9, libcmocka-dev, python3-docutils ]
   homebrew:
     update: true
     packages: [ lzo, lz4, cmocka ]