diff --git a/.travis.yml b/.travis.yml
index 93ca51a..d0ec8ee 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -64,7 +64,7 @@ matrix:
     - os: linux
       dist: trusty
       compiler: g++-7
-      env: TOOLSET=gcc COMPILER=g++-7 CXXSTD=c++17
+      env: TOOLSET=gcc COMPILER=g++-7 CXXSTD=c++14
       addons:
         apt:
           packages: