diff --git a/src/Makefile b/src/Makefile
index 36b782b..b5786f8 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -12,7 +12,7 @@ prefix      ?= /usr/local
 exec_prefix ?= $(prefix)
 bindir      ?= $(exec_prefix)/bin
 
-override CXXFLAGS += -std=c++20 -Wall -fexceptions
+override CXXFLAGS += -std=c++2a -Wall -fexceptions
 override LDFLAGS  += -pthread
 
 all: $(PROGNAME)