diff --git a/.travis.yml b/.travis.yml
index 9f4404d1..872230c6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,4 @@
-language: python3
+language: python3.6
 
 cache: pip # enable cache for "$HOME/.cache/pip" directory
 
@@ -9,11 +9,11 @@ env:
 
 before_install:
   - export CFLAGS=-O0 # considerably speed-up build time for pip packages (especially lxml), optimizations doesn't matter for ci
-  - pip3 install pyyaml
-  - python3 verify_files.py # make sure input files are OK before wasting time with prereqs
+  - pip3.6 install pyyaml
+  - python3.6 verify_files.py # make sure input files are OK before wasting time with prereqs
 
 install:
-  - pip3 install -r requirements.txt
+  - pip3.6 install -r requirements.txt
 
 script: bash ./.ci/deploy.sh