diff --git a/update_3.0.x_3.1.0.sql b/update_3.0.x_3.1.0.sql
new file mode 100644
index 0000000..e2c7957
--- /dev/null
+++ b/update_3.0.x_3.1.0.sql
@@ -0,0 +1,7 @@
+ALTER TABLE wcf1_user CHANGE chatColor1 chatColor1 INT(10) DEFAULT NULL;
+ALTER TABLE wcf1_user CHANGE chatColor2 chatColor2 INT(10) DEFAULT NULL;
+
+ALTER TABLE chat1_message CHANGE color1 color1 INT(10) DEFAULT NULL;
+ALTER TABLE chat1_message CHANGE color2 color2 INT(10) DEFAULT NULL;
+
+UPDATE wcf1_user SET chatColor1 = NULL, chatColor2 = NULL WHERE chatColor1 = 0 AND chatColor2 = 0;