diff --git a/.travis.yml b/.travis.yml
index 51df285..711752f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ compiler:
   - clang
 
 install:
+ - sudo apt-get update
  - sudo apt-get install libconfig8-dev
  - sudo apt-get install libreadline6-dev
  - sudo apt-get install libssl-dev