diff --git a/.travis.yml b/.travis.yml
index 8f24e27ed44d624f8582d0bc83ab497111a6db5c..b4a5ad8be77c1b275ad80ad47700f52110c6f7e6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -128,6 +128,9 @@ after_success:
       ;
     fi
 
+before_deploy:
+  - rvm 1.9.3 do gem install mime-types -v 2.6.2
+
 deploy:
   - provider: s3
     access_key_id: AKIAIVORNALE7NHD3T6Q