diff --git a/.travis.yml b/.travis.yml
index 7d01a5b89d..42f9fc216a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -43,10 +43,9 @@ matrix:
         - sudo apt-get install -y --allow-unauthenticated libopenblas-dev liblapack-dev g++ libboost-all-dev wget
         - wget https://julialang-s3.julialang.org/bin/linux/x64/1.1/julia-1.1.1-linux-x86_64.tar.gz
         - sudo tar -C /opt/ -xvpf julia-1.1.1-linux-x86_64.tar.gz
-        - wget https://ftp.fau.de/macports/distfiles/armadillo/armadillo-8.500.0.tar.xz
-        - tar xvf armadillo-8.500.0.tar.xz && cd armadillo*
+        - wget https://ftp.fau.de/macports/distfiles/armadillo/armadillo-8.400.0.tar.xz
+        - tar xvf armadillo-8.400.0.tar.xz && cd armadillo*
         - cmake . && make && sudo make install && cd ..
-        - sudo cp .travis/config.hpp /usr/include/armadillo_bits/config.hpp
 
     - os: osx
       osx_image: xcode9.4 # Maybe we can try some different ones?