diff --git a/400_xowa/src/gplx/xowa/xtns/scribunto/libs/Scrib_lib_ustring__match__tst.java b/400_xowa/src/gplx/xowa/xtns/scribunto/libs/Scrib_lib_ustring__match__tst.java
index e751d5a0d..2d3a4e5de 100644
--- a/400_xowa/src/gplx/xowa/xtns/scribunto/libs/Scrib_lib_ustring__match__tst.java
+++ b/400_xowa/src/gplx/xowa/xtns/scribunto/libs/Scrib_lib_ustring__match__tst.java
@@ -47,6 +47,11 @@ public class Scrib_lib_ustring__match__tst {
 	@Test  public void Balanced__numbered_2() {
 		Exec_match("A88B[[5]]X99Y", "A(%d)%1B%b[]X(%d)%2Y", 1, "8;9");
 	}
+	@Test   public void Unicode_alpha() {// ISSUE#:502; DATE:2019-07-01
+		Exec_match("ä"	, "%a", 1, "ä");
+	}
+
+
 //		@Test  public void Match_viwiktionary() {
 //			fxt.Init_cbk(Scrib_core.Key_mw_interface, fxt.Core().Lib_ustring(), Scrib_lib_ustring.Invk_match);
 //			Exec_match("tr"	, "()(r)", 1, ";");						// should return all matches
diff --git a/400_xowa/src/gplx/xowa/xtns/scribunto/libs/Scrib_regx_converter.java b/400_xowa/src/gplx/xowa/xtns/scribunto/libs/Scrib_regx_converter.java
index dc2f8ce8f..9d7c40c61 100644
--- a/400_xowa/src/gplx/xowa/xtns/scribunto/libs/Scrib_regx_converter.java
+++ b/400_xowa/src/gplx/xowa/xtns/scribunto/libs/Scrib_regx_converter.java
@@ -306,7 +306,7 @@ class Lua_cls_matcher {
 		Init_itm(Bool_.Y, "s", "\\s");						// JAVA: \p{Xps} not valid; REF: https://docs.oracle.com/javase/6/docs/api/java/util/regex/Pattern.html
 		Init_itm(Bool_.Y, "u", "\\p{Lu}");
 		Init_itm(Bool_.Y, "w", regx_w);
-		Init_itm(Bool_.Y, "x", "[0-9A-Fa-f0-9A-Fa-f]");
+		Init_itm(Bool_.Y, "x", "[0-9A-Fa-f０-９Ａ-Ｆａ-ｆ]");
 		Init_itm(Bool_.Y, "z", "\\x00");
 
 		Init_itm(Bool_.Y, "A", "\\P{L}");
@@ -317,11 +317,11 @@ class Lua_cls_matcher {
 		Init_itm(Bool_.Y, "S", "\\S");						// JAVA: \P{Xps} not valid
 		Init_itm(Bool_.Y, "U", "\\P{Lu}");
 		Init_itm(Bool_.Y, "W", regx_W);
-		Init_itm(Bool_.Y, "X", "[^0-9A-Fa-f0-9A-Fa-f]");
+		Init_itm(Bool_.Y, "X", "[^0-9A-Fa-f０-９Ａ-Ｆａ-ｆ]");
 		Init_itm(Bool_.Y, "Z", "[^\\x00]");
 
 		Init_itm(Bool_.N, "w", regx_w);
-		Init_itm(Bool_.N, "x", "0-9A-Fa-f0-9A-Fa-f");
+		Init_itm(Bool_.N, "x", "0-9A-Fa-f０-９Ａ-Ｆａ-ｆ");
 		Init_itm(Bool_.N, "W", regx_W);
 		Init_itm(Bool_.N, "X", "\\x00-\\x2f\\x3a-\\x40\\x47-\\x60\\x67-\\x{ff0f}\\x{ff1a}-\\x{ff20}\\x{ff27}-\\x{ff40}\\x{ff47}-\\x{10ffff}");
 		Init_itm(Bool_.N, "Z", "\\x01-\\x{10ffff}");
diff --git a/res/bin/any/java/luaj/luaj_xowa.jar b/res/bin/any/java/luaj/luaj_xowa.jar
index f639d3a3d..46537b5c2 100644
Binary files a/res/bin/any/java/luaj/luaj_xowa.jar and b/res/bin/any/java/luaj/luaj_xowa.jar differ