diff --git a/Makefile b/Makefile
index 10c499e..ab7f06b 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ CFLAGS = -Wall -Wextra -Wpedantic -std=c17 -O3
 
 .PHONY: clean
 
-hbas: hbas.c
+hbas: src/hbas.c
 	${CC} ${CFLAGS} ${CFLAGS_EXTRA} hbas.c -o hbas
 
 example: hbas example.S
diff --git a/error.h b/src/error.h
similarity index 100%
rename from error.h
rename to src/error.h
diff --git a/hash.c b/src/hash.c
similarity index 100%
rename from hash.c
rename to src/hash.c
diff --git a/hbas.c b/src/hbas.c
similarity index 100%
rename from hbas.c
rename to src/hbas.c
diff --git a/instructions.c b/src/instructions.c
similarity index 100%
rename from instructions.c
rename to src/instructions.c
diff --git a/op.h b/src/op.h
similarity index 100%
rename from op.h
rename to src/op.h