diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6447038..0959886 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,10 @@ test:
     stage: test
     image: archlinux
     script:
-        - pacman -Syu --noconfirm luarocks lua51 gcc opencc
-        - luarocks install --lua-version 5.1 busted
-        - luarocks make --lua-version 5.1
-        - busted busted_unittest.lua
\ No newline at end of file
+        - pacman -Syu --noconfirm luarocks gcc opencc lua51 lua52 lua53 lua
+        - for i in 5.1 5.2 5.3 5.4; do
+        - luarocks install --lua-version $i busted
+        - luarocks make --lua-version $i
+        - busted busted_unittest.lua
+        - luarocks remove --lua-version $i busted
+        - done
\ No newline at end of file
diff --git a/luaocc-0.1-2.rockspec b/luaocc-0.1-2.rockspec
index 714508c..f2f5fbb 100644
--- a/luaocc-0.1-2.rockspec
+++ b/luaocc-0.1-2.rockspec
@@ -10,7 +10,7 @@ description = {
    license = "Apache"
 }
 dependencies = {
-   "lua ~> 5.1"
+   "lua >= 5.1 <= 5.4"
 }
 external_dependencies = {
    OPENCC = {
diff --git a/main.c b/main.c
index 951386a..06593e4 100644
--- a/main.c
+++ b/main.c
@@ -35,21 +35,26 @@ static int L_close(lua_State *L) {
 	return 0;
 }
 
-static const struct luaL_reg occlib[] = {
+static const struct luaL_Reg occlib[] = {
 	{"open", L_open},
 	{"convert", L_convert},
 	{NULL, NULL}
 };
 
-static const struct luaL_reg occmt[] = {
+static const struct luaL_Reg occmt[] = {
 	{"__call", L_convert},
 	{"__gc", L_close},
 	{NULL, NULL}
 };
 
+#if (LUA_VERSION_NUM >= 502)
+	#define luaL_register(L, _, l) luaL_setfuncs(L, l, 0)
+#endif
+
 int luaopen_luaocc(lua_State *L) {
 	luaL_newmetatable(L, "luaocc");
 	luaL_register(L, NULL, occmt);
-	luaL_register(L, "luaocc", occlib);
+	lua_newtable(L);
+	luaL_register(L, NULL, occlib);
 	return 1;
-}
\ No newline at end of file
+}