diff --git a/components/prism-css.js b/components/prism-css.js
index ca86ba6f9f..9bc63fa637 100644
--- a/components/prism-css.js
+++ b/components/prism-css.js
@@ -7,9 +7,9 @@ Prism.languages.css = {
 			// See rest below
 		}
 	},
-	'url': /url\((?:(["'])(\\\n|\\?.)*?\1|.*?)\)/i,
+	'url': /url\((?:(["'])(\\[\w\W]|(?!\1)[^\\\r\n])*\1|.*?)\)/i,
 	'selector': /[^\{\}\s][^\{\};]*(?=\s*\{)/,
-	'string': /("|')(\\\n|\\?.)*?\1/,
+	'string': /("|')(\\[\w\W]|(?!\1)[^\\\r\n])*\1/,
 	'property': /(\b|\B)[\w-]+(?=\s*:)/i,
 	'important': /\B!important\b/i,
 	'function': /[-a-z0-9]+(?=\()/i,
diff --git a/components/prism-css.min.js b/components/prism-css.min.js
index f3d20421d2..0fdb8d51da 100644
--- a/components/prism-css.min.js
+++ b/components/prism-css.min.js
@@ -1 +1 @@
-Prism.languages.css={comment:/\/\*[\w\W]*?\*\//,atrule:{pattern:/@[\w-]+?.*?(;|(?=\s*\{))/i,inside:{rule:/@[\w-]+/}},url:/url\((?:(["'])(\\\n|\\?.)*?\1|.*?)\)/i,selector:/[^\{\}\s][^\{\};]*(?=\s*\{)/,string:/("|')(\\\n|\\?.)*?\1/,property:/(\b|\B)[\w-]+(?=\s*:)/i,important:/\B!important\b/i,"function":/[-a-z0-9]+(?=\()/i,punctuation:/[(){};:]/},Prism.languages.css.atrule.inside.rest=Prism.util.clone(Prism.languages.css),Prism.languages.markup&&(Prism.languages.insertBefore("markup","tag",{style:{pattern:/<style[\w\W]*?>[\w\W]*?<\/style>/i,inside:{tag:{pattern:/<style[\w\W]*?>|<\/style>/i,inside:Prism.languages.markup.tag.inside},rest:Prism.languages.css},alias:"language-css"}}),Prism.languages.insertBefore("inside","attr-value",{"style-attr":{pattern:/\s*style=("|').*?\1/i,inside:{"attr-name":{pattern:/^\s*style/i,inside:Prism.languages.markup.tag.inside},punctuation:/^\s*=\s*['"]|['"]\s*$/,"attr-value":{pattern:/.+/i,inside:Prism.languages.css}},alias:"language-css"}},Prism.languages.markup.tag));
\ No newline at end of file
+Prism.languages.css={comment:/\/\*[\w\W]*?\*\//,atrule:{pattern:/@[\w-]+?.*?(;|(?=\s*\{))/i,inside:{rule:/@[\w-]+/}},url:/url\((?:(["'])(\\[\w\W]|(?!\1)[^\\\r\n])*\1|.*?)\)/i,selector:/[^\{\}\s][^\{\};]*(?=\s*\{)/,string:/("|')(\\[\w\W]|(?!\1)[^\\\r\n])*\1/,property:/(\b|\B)[\w-]+(?=\s*:)/i,important:/\B!important\b/i,"function":/[-a-z0-9]+(?=\()/i,punctuation:/[(){};:]/},Prism.languages.css.atrule.inside.rest=Prism.util.clone(Prism.languages.css),Prism.languages.markup&&(Prism.languages.insertBefore("markup","tag",{style:{pattern:/<style[\w\W]*?>[\w\W]*?<\/style>/i,inside:{tag:{pattern:/<style[\w\W]*?>|<\/style>/i,inside:Prism.languages.markup.tag.inside},rest:Prism.languages.css},alias:"language-css"}}),Prism.languages.insertBefore("inside","attr-value",{"style-attr":{pattern:/\s*style=("|').*?\1/i,inside:{"attr-name":{pattern:/^\s*style/i,inside:Prism.languages.markup.tag.inside},punctuation:/^\s*=\s*['"]|['"]\s*$/,"attr-value":{pattern:/.+/i,inside:Prism.languages.css}},alias:"language-css"}},Prism.languages.markup.tag));
\ No newline at end of file
diff --git a/prism.js b/prism.js
index 59c1e13bc2..49e0a9090c 100644
--- a/prism.js
+++ b/prism.js
@@ -491,9 +491,9 @@ Prism.languages.css = {
 			// See rest below
 		}
 	},
-	'url': /url\((?:(["'])(\\\n|\\?.)*?\1|.*?)\)/i,
+	'url': /url\((?:(["'])(\\[\w\W]|(?!\1)[^\\\r\n])*\1|.*?)\)/i,
 	'selector': /[^\{\}\s][^\{\};]*(?=\s*\{)/,
-	'string': /("|')(\\\n|\\?.)*?\1/,
+	'string': /("|')(\\[\w\W]|(?!\1)[^\\\r\n])*\1/,
 	'property': /(\b|\B)[\w-]+(?=\s*:)/i,
 	'important': /\B!important\b/i,
 	'function': /[-a-z0-9]+(?=\()/i,