travis: fix failing pipenv install

pypa/pipenv#2924 (comment)
ph4r05 · Oct 8, 2018 · 6a0ea22 · 6a0ea22
1 parent 4343940
commit 6a0ea22
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -49,6 +49,7 @@ install:
     - ./travis-install-libsodium.sh
     - export PKG_CONFIG_PATH=$HOME/libsodium/lib/pkgconfig:$PKG_CONFIG_PATH
     - export LD_LIBRARY_PATH=$HOME/libsodium/lib:$LD_LIBRARY_PATH
+    - pipenv run pip install pip==18.0
     - pipenv install
 
 before_script: