diff --git a/.travis.yml b/.travis.yml
index 0c1963a..acd34a7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,14 +14,14 @@ perl:
 matrix:
     include:
         - addons:
-             mariadb: 5.5
-          perl: 5.20
+             mariadb: "5.5"
+          perl: "5.20"
         - addons:
-             mariadb: 10.0
-          perl: 5.20
+             mariadb: "10.0"
+          perl: "5.20"
         - addons:
-             mariadb: 10.1
-          perl: 5.20
+             mariadb: "10.1"
+          perl: "5.20"
 
 before_install:
    - git clone git://github.com/haarg/perl-travis-helper