diff --git a/.travis.yml b/.travis.yml
index 6e027f8..6ff977a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,11 +20,12 @@ env:
     - CXX_STANDARD=c++17 BRANCH_TO_TEST=master
     - CXX_STANDARD=c++14 BRANCH_TO_TEST=master
     - CXX_STANDARD=c++11 BRANCH_TO_TEST=master
-    - CXX_STANDARD=c++98 BRANCH_TO_TEST=master
     - CXX_STANDARD=c++11 BRANCH_TO_TEST=boost-1.58.0
     - CXX_STANDARD=c++98 BRANCH_TO_TEST=boost-1.58.0
     - CXX_STANDARD=c++11 BRANCH_TO_TEST=boost-1.59.0
     - CXX_STANDARD=c++98 BRANCH_TO_TEST=boost-1.59.0
+    - CXX_STANDARD=c++11 BRANCH_TO_TEST=boost-1.67.0
+    - CXX_STANDARD=c++98 BRANCH_TO_TEST=boost-1.67.0
 
 compiler:
   - clang
diff --git a/appveyor.yml b/appveyor.yml
index 4770cb0..f20a17e 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -19,10 +19,11 @@ environment:
       BOOST: 1_65_1
       TOOLSET: msvc-14.1
       CXX_STANDARD: 14
-    # - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-    #   BOOST: 1_67_0
-    #   TOOLSET: msvc-14.1
-    #   CXX_STANDARD: 17
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      BOOST: 1_67_0
+      TOOLSET: msvc-14.1
+      CXX_STANDARD: 14
+      # CXX_STANDARD: 17
 
 platform:
   - 32