diff --git a/Makefile b/Makefile
index be77e72..24281e6 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ DEPS := $(SRCS:.cpp=.dep)
 CXX ?= g++
 
 CXXFLAGS += -Wshadow -Wall -Wpedantic -Wextra -Wno-unused-parameter
-CXXFLAGS += -g3 -std=c++20
+CXXFLAGS += -g3 -std=c++17
 ifeq ($(DEBUG),1)
 	CXXFLAGS += -D DEBUG -O0
 else