diff --git a/src/Makevars b/src/Makevars
index d715e498..6660c7f9 100644
--- a/src/Makevars
+++ b/src/Makevars
@@ -1,3 +1,3 @@
-CXX_STD = CXX11
+CXX_STD = CXX14
 PKG_CXXFLAGS = $(SHLIB_OPENMP_CXXFLAGS)
 PKG_LIBS = $(SHLIB_OPENMP_CXXFLAGS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)
diff --git a/src/Makevars.win b/src/Makevars.win
index d715e498..6660c7f9 100644
--- a/src/Makevars.win
+++ b/src/Makevars.win
@@ -1,3 +1,3 @@
-CXX_STD = CXX11
+CXX_STD = CXX14
 PKG_CXXFLAGS = $(SHLIB_OPENMP_CXXFLAGS)
 PKG_LIBS = $(SHLIB_OPENMP_CXXFLAGS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)