diff --git a/.travis.yml b/.travis.yml
index c0ca6e9..67e6fdf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,7 @@
 language: c
 
 before_script:
+  - _libsodium_version=0.4.5
     # install libsodium (needed for libtoxcore)
   - git clone git://github.com/jedisct1/libsodium.git > /dev/null
   - pushd libsodium