diff --git a/src/php_tarantool.h b/src/php_tarantool.h
index c225b85..635e546 100644
--- a/src/php_tarantool.h
+++ b/src/php_tarantool.h
@@ -29,6 +29,39 @@
 #  define smart_string_free_ex(...) smart_str_free_ex(__VA_ARGS__)
 #endif
 
+#if PHP_VERSION_ID < 70300
+#define GC_ADDREF(p)            ++GC_REFCOUNT(p)
+#define GC_DELREF(p)            --GC_REFCOUNT(p)
+#define GC_SET_REFCOUNT(p, rc)  GC_REFCOUNT(p) = rc
+#endif
+
+
+#if PHP_VERSION_ID < 70300
+#  define ARRAY_PROTECT_RECURSION(data) \
+	if (Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data))) \
+		Z_ARRVAL_P(data)->u.v.nApplyCount++;
+
+#  define ARRAY_UNPROTECT_RECURSION(data) \
+	if (Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data))) \
+		Z_ARRVAL_P(data)->u.v.nApplyCount--;
+
+#  define ARRAY_IS_PROTECT_RECURSION(data) \
+	(Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)) && Z_ARRVAL_P(data)->u.v.nApplyCount > 1)
+
+#else
+#  define ARRAY_PROTECT_RECURSION(data) \
+	if (Z_TYPE_P(data) == IS_ARRAY && !(GC_FLAGS(Z_ARRVAL_P(data)) & GC_IMMUTABLE)) \
+		GC_PROTECT_RECURSION(Z_ARRVAL_P(data));
+
+#  define ARRAY_UNPROTECT_RECURSION(data) \
+	if (Z_TYPE_P(data) == IS_ARRAY && !(GC_FLAGS(Z_ARRVAL_P(data)) & GC_IMMUTABLE)) \
+		GC_UNPROTECT_RECURSION(Z_ARRVAL_P(data));
+
+#  define ARRAY_IS_PROTECT_RECURSION(data) \
+	(Z_TYPE_P(data) == IS_ARRAY && !(GC_FLAGS(Z_ARRVAL_P(data)) & GC_IMMUTABLE) && GC_IS_RECURSIVE(Z_ARRVAL_P(data)))
+
+#endif
+
 extern zend_module_entry tarantool_module_entry;
 #define phpext_tarantool_ptr &tarantool_module_entry
 
diff --git a/src/tarantool.c b/src/tarantool.c
index 30cccd9..c0a669a 100644
--- a/src/tarantool.c
+++ b/src/tarantool.c
@@ -1150,7 +1150,7 @@ PHP_METHOD(Tarantool, __construct) {
 		memset(&le, 0, sizeof(zend_resource));
 		le.type = php_tarantool_list_entry();
 		le.ptr  = obj;
-		GC_REFCOUNT(&le) = 1;
+		GC_SET_REFCOUNT(&le, 1);
 
 		assert(plist_id != NULL);
 		if (zend_hash_update_mem(&EG(persistent_list), plist_id,
diff --git a/src/tarantool_msgpack.c b/src/tarantool_msgpack.c
index 817e4c5..e0007fe 100644
--- a/src/tarantool_msgpack.c
+++ b/src/tarantool_msgpack.c
@@ -122,16 +122,12 @@ void php_mp_pack_array_recursively(smart_string *str, zval *val) {
 	size_t key_index = 0;
 	for (; key_index < n; ++key_index) {
 		data = zend_hash_index_find(ht, key_index);
-		if (!data || data == val || (Z_TYPE_P(data) == IS_ARRAY &&
-					     ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)) &&
-					     Z_ARRVAL_P(data)->u.v.nApplyCount > 1)) {
+		if (!data || data == val || ARRAY_IS_PROTECT_RECURSION(data)) {
 			php_mp_pack_nil(str);
 		} else {
-			if (Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)))
-				Z_ARRVAL_P(data)->u.v.nApplyCount++;
+            ARRAY_PROTECT_RECURSION(data);
 			php_mp_pack(str, data);
-			if (Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)))
-				Z_ARRVAL_P(data)->u.v.nApplyCount--;
+            ARRAY_UNPROTECT_RECURSION(data)
 		}
 	}
 }
@@ -165,16 +161,12 @@ void php_mp_pack_hash_recursively(smart_string *str, zval *val) {
 			break;
 		}
 		data = zend_hash_get_current_data_ex(ht, &pos);
-		if (!data || data == val || (Z_TYPE_P(data) == IS_ARRAY &&
-					    ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)) &&
-					    Z_ARRVAL_P(data)->u.v.nApplyCount > 1)) {
+		if (!data || data == val || ARRAY_IS_PROTECT_RECURSION(data)) {
 			php_mp_pack_nil(str);
 		} else {
-			if (Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)))
-				Z_ARRVAL_P(data)->u.v.nApplyCount++;
+			ARRAY_PROTECT_RECURSION(data);
 			php_mp_pack(str, data);
-			if (Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)))
-				Z_ARRVAL_P(data)->u.v.nApplyCount--;
+			ARRAY_UNPROTECT_RECURSION(data);
 		}
 	}
 }
@@ -407,15 +399,12 @@ size_t php_mp_sizeof_array_recursively(zval *val) {
 
 	for (; key_index < n; ++key_index) {
 		data = zend_hash_index_find(ht, key_index);
-		if (!data || data == val ||
-				(Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)) && Z_ARRVAL_P(data)->u.v.nApplyCount > 1)) {
+		if (!data || data == val || ARRAY_IS_PROTECT_RECURSION(data)) {
 			needed += php_mp_sizeof_nil();
 		} else {
-			if (Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)))
-				Z_ARRVAL_P(data)->u.v.nApplyCount++;
+			ARRAY_PROTECT_RECURSION(data);
 			needed += php_mp_sizeof(data);
-			if (Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)))
-				Z_ARRVAL_P(data)->u.v.nApplyCount--;
+			ARRAY_UNPROTECT_RECURSION(data);
 		}
 	}
 	return needed;
@@ -451,15 +440,12 @@ size_t php_mp_sizeof_hash_recursively(zval *val) {
 			break;
 		}
 		data = zend_hash_get_current_data_ex(ht, &pos);
-		if (!data || data == val ||
-				(Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)) && Z_ARRVAL_P(data)->u.v.nApplyCount > 1)) {
+		if (!data || data == val || ARRAY_IS_PROTECT_RECURSION(data)) {
 			needed += php_mp_sizeof_nil();
 		} else {
-			if (Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)))
-				Z_ARRVAL_P(data)->u.v.nApplyCount++;
+			ARRAY_PROTECT_RECURSION(data);
 			needed += php_mp_sizeof(data);
-			if (Z_TYPE_P(data) == IS_ARRAY && ZEND_HASH_APPLY_PROTECTION(Z_ARRVAL_P(data)))
-				Z_ARRVAL_P(data)->u.v.nApplyCount--;
+			ARRAY_UNPROTECT_RECURSION(data);
 		}
 	}
 	return needed;
diff --git a/src/utils.c b/src/utils.c
index 45467af..2c743f4 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -29,8 +29,10 @@ const char *tutils_op_to_string(zval *obj) {
 		return "RESOURCE";
 	case(IS_REFERENCE):
 		return "REFERENCE";
+#if PHP_VERSION_ID < 70300
 	case(IS_CONSTANT):
 		return "CONSTANT";
+#endif
 	case(IS_CONSTANT_AST):
 		return "CONSTANT_AST";
 	case(IS_CALLABLE):