diff --git a/ibex_demo_system.core b/ibex_demo_system.core
index 2045ac41..dd3b38e3 100644
--- a/ibex_demo_system.core
+++ b/ibex_demo_system.core
@@ -178,7 +178,7 @@ targets:
           - '--trace-structs'
           - '--trace-params'
           - '--trace-max-array 1024'
-          - '-CFLAGS "-std=c++11 -Wall -DVM_TRACE_FMT_FST -DTOPLEVEL_NAME=top_verilator"'
+          - '-CFLAGS "-std=c++14 -Wall -DVM_TRACE_FMT_FST -DTOPLEVEL_NAME=top_verilator"'
           - '-LDFLAGS "-pthread -lutil -lelf"'
           - "-Wall"
           - "-Wwarn-IMPERFECTSCH"