diff --git a/Makefile b/Makefile
index 1d7fb1e..1c659d6 100644
--- a/Makefile
+++ b/Makefile
@@ -3,11 +3,11 @@ CC = /usr/bin/clang++
 GDB = /usr/bin/gdb
 OLEVEL = -O2
 
-CFLAGS = -Wall -std=c++20 $(OLEVEL) -o $(PROJ)
+CFLAGS = -Wall -std=c++17 $(OLEVEL) -o $(PROJ)
 
 OBJECTS = src/wtpp.cpp
 
-build:
+build: clean
 	$(CC) $(CFLAGS) $(OBJECTS)
 
 clean: