diff --git a/components/prism-javascript.js b/components/prism-javascript.js
index d4f1025dbf..a0eeb3c62f 100644
--- a/components/prism-javascript.js
+++ b/components/prism-javascript.js
@@ -1,7 +1,8 @@
 Prism.languages.javascript = Prism.languages.extend('clike', {
 	'keyword': /\b(as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|false|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|true|try|typeof|var|void|while|with|yield)\b/,
 	'number': /\b-?(0x[\dA-Fa-f]+|0b[01]+|0o[0-7]+|\d*\.?\d+([Ee][+-]?\d+)?|NaN|Infinity)\b/,
-	'function': /(?!\d)[a-z0-9_$]+(?=\()/i
+	// Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
+	'function': /[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*(?=\()/i
 });
 
 Prism.languages.insertBefore('javascript', 'keyword', {
diff --git a/components/prism-javascript.min.js b/components/prism-javascript.min.js
index a3a4a002ab..f141001f70 100644
--- a/components/prism-javascript.min.js
+++ b/components/prism-javascript.min.js
@@ -1 +1 @@
-Prism.languages.javascript=Prism.languages.extend("clike",{keyword:/\b(as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|false|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|true|try|typeof|var|void|while|with|yield)\b/,number:/\b-?(0x[\dA-Fa-f]+|0b[01]+|0o[0-7]+|\d*\.?\d+([Ee][+-]?\d+)?|NaN|Infinity)\b/,"function":/(?!\d)[a-z0-9_$]+(?=\()/i}),Prism.languages.insertBefore("javascript","keyword",{regex:{pattern:/(^|[^/])\/(?!\/)(\[.+?]|\\.|[^/\\\r\n])+\/[gimyu]{0,5}(?=\s*($|[\r\n,.;})]))/,lookbehind:!0}}),Prism.languages.insertBefore("javascript","class-name",{"template-string":{pattern:/`(?:\\`|\\?[^`])*`/,inside:{interpolation:{pattern:/\$\{[^}]+\}/,inside:{"interpolation-punctuation":{pattern:/^\$\{|\}$/,alias:"punctuation"},rest:Prism.languages.javascript}},string:/[\s\S]+/}}}),Prism.languages.markup&&Prism.languages.insertBefore("markup","tag",{script:{pattern:/<script[\w\W]*?>[\w\W]*?<\/script>/i,inside:{tag:{pattern:/<script[\w\W]*?>|<\/script>/i,inside:Prism.languages.markup.tag.inside},rest:Prism.languages.javascript},alias:"language-javascript"}});
\ No newline at end of file
+Prism.languages.javascript=Prism.languages.extend("clike",{keyword:/\b(as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|false|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|true|try|typeof|var|void|while|with|yield)\b/,number:/\b-?(0x[\dA-Fa-f]+|0b[01]+|0o[0-7]+|\d*\.?\d+([Ee][+-]?\d+)?|NaN|Infinity)\b/,"function":/[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*(?=\()/i}),Prism.languages.insertBefore("javascript","keyword",{regex:{pattern:/(^|[^/])\/(?!\/)(\[.+?]|\\.|[^/\\\r\n])+\/[gimyu]{0,5}(?=\s*($|[\r\n,.;})]))/,lookbehind:!0}}),Prism.languages.insertBefore("javascript","class-name",{"template-string":{pattern:/`(?:\\`|\\?[^`])*`/,inside:{interpolation:{pattern:/\$\{[^}]+\}/,inside:{"interpolation-punctuation":{pattern:/^\$\{|\}$/,alias:"punctuation"},rest:Prism.languages.javascript}},string:/[\s\S]+/}}}),Prism.languages.markup&&Prism.languages.insertBefore("markup","tag",{script:{pattern:/<script[\w\W]*?>[\w\W]*?<\/script>/i,inside:{tag:{pattern:/<script[\w\W]*?>|<\/script>/i,inside:Prism.languages.markup.tag.inside},rest:Prism.languages.javascript},alias:"language-javascript"}});
\ No newline at end of file
diff --git a/prism.js b/prism.js
index c81742946b..90744ba909 100644
--- a/prism.js
+++ b/prism.js
@@ -582,7 +582,8 @@ Prism.languages.clike = {
 Prism.languages.javascript = Prism.languages.extend('clike', {
 	'keyword': /\b(as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|false|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|true|try|typeof|var|void|while|with|yield)\b/,
 	'number': /\b-?(0x[\dA-Fa-f]+|0b[01]+|0o[0-7]+|\d*\.?\d+([Ee][+-]?\d+)?|NaN|Infinity)\b/,
-	'function': /(?!\d)[a-z0-9_$]+(?=\()/i
+	// Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
+	'function': /[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*(?=\()/i
 });
 
 Prism.languages.insertBefore('javascript', 'keyword', {
diff --git a/tests/languages/javascript/function_feature.test b/tests/languages/javascript/function_feature.test
index fca4a30048..e805e87df3 100644
--- a/tests/languages/javascript/function_feature.test
+++ b/tests/languages/javascript/function_feature.test
@@ -3,6 +3,8 @@ foo_bar()
 f42()
 _()
 $()
+ಠ_ಠ()
+Ƞȡ_҇()
 
 ----------------------------------------------------
 
@@ -11,10 +13,11 @@ $()
 	["function", "foo_bar"], ["punctuation", "("], ["punctuation", ")"],
 	["function", "f42"], ["punctuation", "("], ["punctuation", ")"],
 	["function", "_"], ["punctuation", "("], ["punctuation", ")"],
-	["function", "$"], ["punctuation", "("], ["punctuation", ")"]
+	["function", "$"], ["punctuation", "("], ["punctuation", ")"],
+	["function", "ಠ_ಠ"], ["punctuation", "("], ["punctuation", ")"],
+	["function", "Ƞȡ_҇"], ["punctuation", "("], ["punctuation", ")"]
 ]
 
 ----------------------------------------------------
 
-Checks for functions.
-Also checks that function starting with a number are not highlighted.
\ No newline at end of file
+Checks for functions. Also checks for unicode characters in identifiers.