diff --git a/Sources/Unicode/CaseFold.php b/Sources/Unicode/CaseFold.php
index 24d097936e..52befa30df 100644
--- a/Sources/Unicode/CaseFold.php
+++ b/Sources/Unicode/CaseFold.php
@@ -815,10 +815,12 @@ function utf8_casefold_simple_maps()
 		"\xE1\xBF\x8A" => "\xE1\xBD\xB4",
 		"\xE1\xBF\x8B" => "\xE1\xBD\xB5",
 		"\xE1\xBF\x8C" => "\xE1\xBF\x83",
+		"\xE1\xBF\x93" => "\xCE\x90",
 		"\xE1\xBF\x98" => "\xE1\xBF\x90",
 		"\xE1\xBF\x99" => "\xE1\xBF\x91",
 		"\xE1\xBF\x9A" => "\xE1\xBD\xB6",
 		"\xE1\xBF\x9B" => "\xE1\xBD\xB7",
+		"\xE1\xBF\xA3" => "\xCE\xB0",
 		"\xE1\xBF\xA8" => "\xE1\xBF\xA0",
 		"\xE1\xBF\xA9" => "\xE1\xBF\xA1",
 		"\xE1\xBF\xAA" => "\xE1\xBD\xBA",
@@ -1195,6 +1197,7 @@ function utf8_casefold_simple_maps()
 		"\xEA\xAE\xBD" => "\xE1\x8F\xAD",
 		"\xEA\xAE\xBE" => "\xE1\x8F\xAE",
 		"\xEA\xAE\xBF" => "\xE1\x8F\xAF",
+		"\xEF\xAC\x85" => "\xEF\xAC\x86",
 		"\xEF\xBC\xA1" => "\xEF\xBD\x81",
 		"\xEF\xBC\xA2" => "\xEF\xBD\x82",
 		"\xEF\xBC\xA3" => "\xEF\xBD\x83",
diff --git a/Sources/Unicode/Idna.php b/Sources/Unicode/Idna.php
index 5535d743f6..b4da7789d9 100644
--- a/Sources/Unicode/Idna.php
+++ b/Sources/Unicode/Idna.php
@@ -831,7 +831,7 @@ function idna_maps()
 		"\xE1\xBA\x94" => "\xE1\xBA\x95",
 		"\xE1\xBA\x9A" => "\x61\xCA\xBE",
 		"\xE1\xBA\x9B" => "\xE1\xB9\xA1",
-		"\xE1\xBA\x9E" => "\x73\x73",
+		"\xE1\xBA\x9E" => "\xC3\x9F",
 		"\xE1\xBA\xA0" => "\xE1\xBA\xA1",
 		"\xE1\xBA\xA2" => "\xE1\xBA\xA3",
 		"\xE1\xBA\xA4" => "\xE1\xBA\xA5",
@@ -6369,8 +6369,6 @@ function idna_regex()
 			'\x{2101}' .
 			'\x{2105}' .
 			'\x{2106}' .
-			'\x{2260}' .
-			'\x{226E}-\x{226F}' .
 			'\x{2474}' .
 			'\x{2475}' .
 			'\x{2476}' .
@@ -6911,7 +6909,8 @@ function idna_regex()
 			'\x{3130}' .
 			'\x{3164}' .
 			'\x{318F}' .
-			'\x{31E4}-\x{31EF}' .
+			'\x{31E4}-\x{31EE}' .
+			'\x{31EF}' .
 			'\x{321F}' .
 			'\x{33C2}' .
 			'\x{33C7}' .
@@ -7353,7 +7352,8 @@ function idna_regex()
 			'\x{2B73A}-\x{2B73F}' .
 			'\x{2B81E}-\x{2B81F}' .
 			'\x{2CEA2}-\x{2CEAF}' .
-			'\x{2EBE1}-\x{2F7FF}' .
+			'\x{2EBE1}-\x{2EBEF}' .
+			'\x{2EE5E}-\x{2F7FF}' .
 			'\x{2F868}' .
 			'\x{2F874}' .
 			'\x{2F91F}' .
diff --git a/Sources/Unicode/Metadata.php b/Sources/Unicode/Metadata.php
index 2ccf662812..1ca474c0c2 100644
--- a/Sources/Unicode/Metadata.php
+++ b/Sources/Unicode/Metadata.php
@@ -17,6 +17,6 @@
 	die('No direct access...');
 
 if (!defined('SMF_UNICODE_VERSION'))
-	define('SMF_UNICODE_VERSION', '15.0.0.0');
+	define('SMF_UNICODE_VERSION', '15.1.0.0');
 
 ?>
\ No newline at end of file
diff --git a/Sources/Unicode/RegularExpressions.php b/Sources/Unicode/RegularExpressions.php
index a34987d6f0..055e4be3fa 100644
--- a/Sources/Unicode/RegularExpressions.php
+++ b/Sources/Unicode/RegularExpressions.php
@@ -800,13 +800,12 @@ function utf8_regex_properties()
 			'\x{2E9A}' .
 			'\x{2EF4}-\x{2EFF}' .
 			'\x{2FD6}-\x{2FEF}' .
-			'\x{2FFC}-\x{2FFF}' .
 			'\x{3040}' .
 			'\x{3097}-\x{3098}' .
 			'\x{3100}-\x{3104}' .
 			'\x{3130}' .
 			'\x{318F}' .
-			'\x{31E4}-\x{31EF}' .
+			'\x{31E4}-\x{31EE}' .
 			'\x{321F}' .
 			'\x{A48D}-\x{A48F}' .
 			'\x{A4C7}-\x{A4CF}' .
@@ -1229,7 +1228,8 @@ function utf8_regex_properties()
 			'\x{2B73A}-\x{2B73F}' .
 			'\x{2B81E}-\x{2B81F}' .
 			'\x{2CEA2}-\x{2CEAF}' .
-			'\x{2EBE1}-\x{2F7FF}' .
+			'\x{2EBE1}-\x{2EBEF}' .
+			'\x{2EE5E}-\x{2F7FF}' .
 			'\x{2FA1E}-\x{2FFFF}' .
 			'\x{3134B}-\x{3134F}' .
 			'\x{323B0}-\x{E0000}' .
@@ -1692,6 +1692,7 @@ function utf8_regex_properties()
 			'\x{2B740}-\x{2B81D}' .
 			'\x{2B820}-\x{2CEA1}' .
 			'\x{2CEB0}-\x{2EBE0}' .
+			'\x{2EBF0}-\x{2EE5D}' .
 			'\x{2F800}-\x{2FA1D}' .
 			'\x{30000}-\x{3134A}' .
 			'\x{31350}-\x{323AF}',
@@ -1737,9 +1738,7 @@ function utf8_regex_variation_selectors()
 			'\x{231A}-\x{231B}' .
 			'\x{2328}' .
 			'\x{23CF}' .
-			'\x{23E9}-\x{23EA}' .
-			'\x{23ED}-\x{23EF}' .
-			'\x{23F1}-\x{23F3}' .
+			'\x{23E9}-\x{23F3}' .
 			'\x{23F8}-\x{23FA}' .
 			'\x{24C2}' .
 			'\x{25AA}-\x{25AB}' .
@@ -1777,7 +1776,7 @@ function utf8_regex_variation_selectors()
 			'\x{26BD}-\x{26BE}' .
 			'\x{26C4}-\x{26C5}' .
 			'\x{26C8}' .
-			'\x{26CF}' .
+			'\x{26CE}-\x{26CF}' .
 			'\x{26D1}' .
 			'\x{26D3}-\x{26D4}' .
 			'\x{26E9}-\x{26EA}' .
@@ -1785,21 +1784,27 @@ function utf8_regex_variation_selectors()
 			'\x{26F7}-\x{26FA}' .
 			'\x{26FD}' .
 			'\x{2702}' .
-			'\x{2708}-\x{2709}' .
-			'\x{270C}-\x{270D}' .
+			'\x{2705}' .
+			'\x{2708}-\x{270D}' .
 			'\x{270F}' .
 			'\x{2712}' .
 			'\x{2714}' .
 			'\x{2716}' .
 			'\x{271D}' .
 			'\x{2721}' .
+			'\x{2728}' .
 			'\x{2733}-\x{2734}' .
 			'\x{2744}' .
 			'\x{2747}' .
-			'\x{2753}' .
+			'\x{274C}' .
+			'\x{274E}' .
+			'\x{2753}-\x{2755}' .
 			'\x{2757}' .
 			'\x{2763}-\x{2764}' .
+			'\x{2795}-\x{2797}' .
 			'\x{27A1}' .
+			'\x{27B0}' .
+			'\x{27BF}' .
 			'\x{2934}-\x{2935}' .
 			'\x{2B05}-\x{2B07}' .
 			'\x{2B1B}-\x{2B1C}' .
@@ -3183,17 +3188,9 @@ function utf8_regex_joining_type()
 				'\x{0711}' .
 				'\x{0730}-\x{074A}',
 		),
-		'Adlam' => array(
-			'Join_Causing' =>
-				'\x{0640}',
-			'Dual_Joining' =>
-				'\x{1E900}-\x{1E943}',
-			'Transparent' =>
-				'\x{1E944}-\x{1E94A}' .
-				'\x{1E94B}',
-		),
 		'Tirhuta' => array(
 			'Dual_Joining' =>
+				'\x{A840}-\x{A871}' .
 				'\x{A840}-\x{A871}',
 			'Transparent' =>
 				'\x{0951}-\x{0957}' .
@@ -3202,6 +3199,15 @@ function utf8_regex_joining_type()
 				'\x{114BF}-\x{114C0}' .
 				'\x{114C2}-\x{114C3}',
 		),
+		'Adlam' => array(
+			'Join_Causing' =>
+				'\x{0640}',
+			'Dual_Joining' =>
+				'\x{1E900}-\x{1E943}',
+			'Transparent' =>
+				'\x{1E944}-\x{1E94A}' .
+				'\x{1E94B}',
+		),
 		'Nko' => array(
 			'Join_Causing' =>
 				'\x{07FA}',
@@ -3536,6 +3542,7 @@ function utf8_regex_indic()
 				'\x{0D54}-\x{0D63}' .
 				'\x{0D66}-\x{0D7F}' .
 				'\x{1CDA}' .
+				'\x{1CF2}' .
 				'\x{A838}',
 			'Letter' =>
 				'\x{0D04}-\x{0D0C}' .
@@ -3545,7 +3552,8 @@ function utf8_regex_indic()
 				'\x{0D4E}' .
 				'\x{0D54}-\x{0D56}' .
 				'\x{0D5F}-\x{0D61}' .
-				'\x{0D7A}-\x{0D7F}',
+				'\x{0D7A}-\x{0D7F}' .
+				'\x{1CF2}',
 			'Nonspacing_Combining_Mark' =>
 				'\x{0951}-\x{0952}' .
 				'\x{0D3B}-\x{0D3C}' .
@@ -3669,13 +3677,15 @@ function utf8_regex_indic()
 				'\x{0DD8}-\x{0DDF}' .
 				'\x{0DE6}-\x{0DEF}' .
 				'\x{0DF2}-\x{0DF4}' .
+				'\x{1CF2}' .
 				'\x{111E1}-\x{111F4}',
 			'Letter' =>
 				'\x{0D85}-\x{0D96}' .
 				'\x{0D9A}-\x{0DB1}' .
 				'\x{0DB3}-\x{0DBB}' .
 				'\x{0DBD}' .
-				'\x{0DC0}-\x{0DC6}',
+				'\x{0DC0}-\x{0DC6}' .
+				'\x{1CF2}',
 			'Nonspacing_Combining_Mark' =>
 				'\x{0DCA}',
 			'Nonspacing_Mark' =>
@@ -3970,6 +3980,9 @@ function utf8_regex_indic()
 				'\x{1CD9}' .
 				'\x{1CDD}' .
 				'\x{1CE0}' .
+				'\x{A838}' .
+				'\x{A83B}' .
+				'\x{A83D}' .
 				'\x{11180}-\x{111DF}',
 			'Letter' =>
 				'\x{11183}-\x{111B2}' .
@@ -4130,8 +4143,8 @@ function utf8_regex_indic()
 				'\x{0964}-\x{0965}' .
 				'\x{1CF2}' .
 				'\x{A838}-\x{A839}' .
-				'\x{A83D}' .
-				'\x{A83F}-\x{A840}' .
+				'\x{A83E}' .
+				'\x{A840}' .
 				'\x{11480}-\x{114C7}' .
 				'\x{114D0}-\x{114D9}',
 			'Letter' =>
@@ -4260,8 +4273,8 @@ function utf8_regex_indic()
 			'All' =>
 				'\x{0964}-\x{0965}' .
 				'\x{A838}-\x{A839}' .
-				'\x{A83C}' .
-				'\x{A83E}-\x{A83F}' .
+				'\x{A83D}' .
+				'\x{A83F}' .
 				'\x{11680}-\x{116B9}' .
 				'\x{116C0}-\x{116C9}',
 			'Letter' =>
diff --git a/Sources/tasks/UpdateUnicode.php b/Sources/tasks/UpdateUnicode.php
index bd1b6317f2..89dc669502 100644
--- a/Sources/tasks/UpdateUnicode.php
+++ b/Sources/tasks/UpdateUnicode.php
@@ -1497,7 +1497,7 @@ private function build_regex_variation_selectors()
 
 		foreach ($this->funcs['utf8_regex_variation_selectors']['data'] as $variation_selector => $class_string)
 		{
-			$this->funcs['utf8_regex_variation_selectors']['data'][$variation_selector] = preg_split('/(?<=})(?=\\\x{)/', $class_string);
+			$this->funcs['utf8_regex_variation_selectors']['data'][$variation_selector] = array_unique(preg_split('/(?<=})(?=\\\x{)/', $class_string));
 		}
 
 		krsort($this->funcs['utf8_regex_variation_selectors']['data']);
@@ -1815,7 +1815,7 @@ private function build_regex_joining_type()
 				return $a['stats']['age'] - $b['stats']['age'];
 			}
 		});
-		foreach ($this->funcs['utf8_regex_joining_type']['data'] as $char_script => $joining_types)
+		foreach ($this->funcs['utf8_regex_joining_type']['data'] as $char_script => &$joining_types)
 		{
 			unset($this->funcs['utf8_regex_joining_type']['data'][$char_script]['stats'], $joining_types['stats']);
 
@@ -1826,7 +1826,7 @@ private function build_regex_joining_type()
 				continue;
 			}
 
-			foreach ($joining_types as $joining_type => $value)
+			foreach ($joining_types as $joining_type => &$value)
 			{
 				sort($value);
 			}
@@ -2001,7 +2001,7 @@ private function build_regex_indic()
 					}
 				}
 
-				$this->funcs['utf8_regex_indic']['data'][$char_script][$insc] = preg_split('/(?<=})(?=\\\x{)/', $class_string);
+				$this->funcs['utf8_regex_indic']['data'][$char_script][$insc] = array_unique(preg_split('/(?<=})(?=\\\x{)/', $class_string));
 			}
 
 			ksort($this->funcs['utf8_regex_indic']['data'][$char_script]);