diff --git a/bootstrap.py b/bootstrap.py
index 106e6a15..6b18d08c 100755
--- a/bootstrap.py
+++ b/bootstrap.py
@@ -56,7 +56,7 @@ args = parser.parse_args()
 # general variables
 include = [ '.', './include' ]
 depends = [os.path.join('Catch', 'include')]
-cxxflags = [ '-Wall', '-Wextra', '-Wpedantic', '-pedantic', '-pedantic-errors', '-Wno-noexcept-type', '-std=c++14', '-ftemplate-depth=1024' ]
+cxxflags = [ '-Wno-unknown-warning', '-Wall', '-Wextra', '-Wpedantic', '-pedantic', '-pedantic-errors', '-Wno-noexcept-type', '-std=c++14', '-ftemplate-depth=1024' ]
 cxxflags.extend([p for p in re.split("( |\\\".*?\\\"|'.*?')", args.cxx_flags) if p.strip()])
 example_cxxflags = [ '-Wall', '-Wextra', '-Wpedantic', '-pedantic', '-pedantic-errors', '-Wno-noexcept-type', '-std=c++14', '-ftemplate-depth=1024' ]
 example_cxxflags.extend([p for p in re.split("( |\\\".*?\\\"|'.*?')", args.cxx_flags) if p.strip()])