diff --git a/Makefile b/Makefile
index 8918b76..8a2b53a 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ else
 	BUILD_SHARED_LIBS := OFF
 endif
 
-API_FILES := \
+API_FILES = \
 	$(addprefix build/, \
 		$(shell find -L \
 			api/ip2region.db \
@@ -21,14 +21,14 @@ API_FILES := \
 			-type f)\
 	)
 
-WEB_FILES := \
+WEB_FILES = \
 	$(addprefix build/, \
 		$(shell find -L \
 			web/dist \
 			-type f)\
 	)
 
-DETECTION_FILES := \
+DETECTION_FILES = \
 	$(addprefix build/, \
 		$(shell find -L \
 			detection \
@@ -37,7 +37,7 @@ DETECTION_FILES := \
 			) \
 	)
 
-SCRIPTS_FILES := \
+SCRIPTS_FILES = \
 	$(addprefix build/, \
 		$(shell find -L \
 			scripts \
@@ -45,7 +45,7 @@ SCRIPTS_FILES := \
 			) \
 	)
 
-DATASET_FILES := \
+DATASET_FILES = \
 	$(addprefix build/, \
 		$(shell find -L \
 			dataset \
@@ -53,7 +53,7 @@ DATASET_FILES := \
 			) \
 	)
 
-ALG_FILES := \
+ALG_FILES = \
 	$(addprefix build/, \
 		$(shell find -L \
 			alg/qrtool \