diff --git a/sk2/Makefile b/sk2/Makefile
index 776d7de..4d821cb 100644
--- a/sk2/Makefile
+++ b/sk2/Makefile
@@ -1,17 +1,17 @@
 CC=gcc
-CFLAGS=-Wall -Wextra -std=c11 -MMD -MP
+CFLAGS=-Wall -Wextra -std=c11
 OBJ=main.o calculator.o
-DEP=$(OBJ:.o=.d)
 
 all: calculator
 
 calculator: $(OBJ)
-	$(CC) $(CFLAGS) -o $@ $^ -lm
+	$(CC) $(CFLAGS) -o calculator $(OBJ) -lm
 
-%.o: %.c
-	$(CC) $(CFLAGS) -c $< -o $@
+main.o: main.c calculator.h
+	$(CC) $(CFLAGS) -c main.c
+
+calculator.o: calculator.c calculator.h
+	$(CC) $(CFLAGS) -c calculator.c
 
 clean:
-	rm -f calculator $(OBJ) $(DEP)
-
--include $(DEP)
+	rm -f calculator $(OBJ)
\ No newline at end of file