diff --git a/components/prism-ruby.js b/components/prism-ruby.js
index 51021b500a..0e4cce4fac 100644
--- a/components/prism-ruby.js
+++ b/components/prism-ruby.js
@@ -13,6 +13,13 @@
 				greedy: true
 			}
 		],
+    'class-name': {
+      pattern: /(\b(?:class)\s+|\bcatch\s+\()[\w.\\]+/i,
+      lookbehind: true,
+      inside: {
+        'punctuation': /[.\\]/
+      }
+    },
 		'keyword': /\b(?:alias|and|BEGIN|begin|break|case|class|def|define_method|defined|do|each|else|elsif|END|end|ensure|extend|for|if|in|include|module|new|next|nil|not|or|prepend|protected|private|public|raise|redo|require|rescue|retry|return|self|super|then|throw|undef|unless|until|when|while|yield)\b/
 	});
 
diff --git a/components/prism-ruby.min.js b/components/prism-ruby.min.js
index ef50729181..022abeb371 100644
--- a/components/prism-ruby.min.js
+++ b/components/prism-ruby.min.js
@@ -1 +1 @@
-!function(e){e.languages.ruby=e.languages.extend("clike",{comment:[/#.*/,{pattern:/^=begin\s[\s\S]*?^=end/m,greedy:!0}],keyword:/\b(?:alias|and|BEGIN|begin|break|case|class|def|define_method|defined|do|each|else|elsif|END|end|ensure|extend|for|if|in|include|module|new|next|nil|not|or|prepend|protected|private|public|raise|redo|require|rescue|retry|return|self|super|then|throw|undef|unless|until|when|while|yield)\b/});var n={pattern:/#\{[^}]+\}/,inside:{delimiter:{pattern:/^#\{|\}$/,alias:"tag"},rest:e.languages.ruby}};delete e.languages.ruby.function,e.languages.insertBefore("ruby","keyword",{regex:[{pattern:/%r([^a-zA-Z0-9\s{(\[<])(?:(?!\1)[^\\]|\\[\s\S])*\1[gim]{0,3}/,greedy:!0,inside:{interpolation:n}},{pattern:/%r\((?:[^()\\]|\\[\s\S])*\)[gim]{0,3}/,greedy:!0,inside:{interpolation:n}},{pattern:/%r\{(?:[^#{}\\]|#(?:\{[^}]+\})?|\\[\s\S])*\}[gim]{0,3}/,greedy:!0,inside:{interpolation:n}},{pattern:/%r\[(?:[^\[\]\\]|\\[\s\S])*\][gim]{0,3}/,greedy:!0,inside:{interpolation:n}},{pattern:/%r<(?:[^<>\\]|\\[\s\S])*>[gim]{0,3}/,greedy:!0,inside:{interpolation:n}},{pattern:/(^|[^/])\/(?!\/)(?:\[.+?]|\\.|[^/\\\r\n])+\/[gim]{0,3}(?=\s*(?:$|[\r\n,.;})]))/,lookbehind:!0,greedy:!0}],variable:/[@$]+[a-zA-Z_]\w*(?:[?!]|\b)/,symbol:{pattern:/(^|[^:]):[a-zA-Z_]\w*(?:[?!]|\b)/,lookbehind:!0},"method-definition":{pattern:/(\bdef\s+)[\w.]+/,lookbehind:!0,inside:{function:/\w+$/,rest:e.languages.ruby}}}),e.languages.insertBefore("ruby","number",{builtin:/\b(?:Array|Bignum|Binding|Class|Continuation|Dir|Exception|FalseClass|File|Stat|Fixnum|Float|Hash|Integer|IO|MatchData|Method|Module|NilClass|Numeric|Object|Proc|Range|Regexp|String|Struct|TMS|Symbol|ThreadGroup|Thread|Time|TrueClass)\b/,constant:/\b[A-Z]\w*(?:[?!]|\b)/}),e.languages.ruby.string=[{pattern:/%[qQiIwWxs]?([^a-zA-Z0-9\s{(\[<])(?:(?!\1)[^\\]|\\[\s\S])*\1/,greedy:!0,inside:{interpolation:n}},{pattern:/%[qQiIwWxs]?\((?:[^()\\]|\\[\s\S])*\)/,greedy:!0,inside:{interpolation:n}},{pattern:/%[qQiIwWxs]?\{(?:[^#{}\\]|#(?:\{[^}]+\})?|\\[\s\S])*\}/,greedy:!0,inside:{interpolation:n}},{pattern:/%[qQiIwWxs]?\[(?:[^\[\]\\]|\\[\s\S])*\]/,greedy:!0,inside:{interpolation:n}},{pattern:/%[qQiIwWxs]?<(?:[^<>\\]|\\[\s\S])*>/,greedy:!0,inside:{interpolation:n}},{pattern:/("|')(?:#\{[^}]+\}|\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,greedy:!0,inside:{interpolation:n}}],e.languages.rb=e.languages.ruby}(Prism);
\ No newline at end of file
+!function(e){e.languages.ruby=e.languages.extend("clike",{comment:[/#.*/,{pattern:/^=begin\s[\s\S]*?^=end/m,greedy:!0}],"class-name":{pattern:/(\b(?:class)\s+|\bcatch\s+\()[\w.\\]+/i,lookbehind:!0,inside:{punctuation:/[.\\]/}},keyword:/\b(?:alias|and|BEGIN|begin|break|case|class|def|define_method|defined|do|each|else|elsif|END|end|ensure|extend|for|if|in|include|module|new|next|nil|not|or|prepend|protected|private|public|raise|redo|require|rescue|retry|return|self|super|then|throw|undef|unless|until|when|while|yield)\b/});var n={pattern:/#\{[^}]+\}/,inside:{delimiter:{pattern:/^#\{|\}$/,alias:"tag"},rest:e.languages.ruby}};delete e.languages.ruby.function,e.languages.insertBefore("ruby","keyword",{regex:[{pattern:/%r([^a-zA-Z0-9\s{(\[<])(?:(?!\1)[^\\]|\\[\s\S])*\1[gim]{0,3}/,greedy:!0,inside:{interpolation:n}},{pattern:/%r\((?:[^()\\]|\\[\s\S])*\)[gim]{0,3}/,greedy:!0,inside:{interpolation:n}},{pattern:/%r\{(?:[^#{}\\]|#(?:\{[^}]+\})?|\\[\s\S])*\}[gim]{0,3}/,greedy:!0,inside:{interpolation:n}},{pattern:/%r\[(?:[^\[\]\\]|\\[\s\S])*\][gim]{0,3}/,greedy:!0,inside:{interpolation:n}},{pattern:/%r<(?:[^<>\\]|\\[\s\S])*>[gim]{0,3}/,greedy:!0,inside:{interpolation:n}},{pattern:/(^|[^/])\/(?!\/)(?:\[.+?]|\\.|[^/\\\r\n])+\/[gim]{0,3}(?=\s*(?:$|[\r\n,.;})]))/,lookbehind:!0,greedy:!0}],variable:/[@$]+[a-zA-Z_]\w*(?:[?!]|\b)/,symbol:{pattern:/(^|[^:]):[a-zA-Z_]\w*(?:[?!]|\b)/,lookbehind:!0},"method-definition":{pattern:/(\bdef\s+)[\w.]+/,lookbehind:!0,inside:{function:/\w+$/,rest:e.languages.ruby}}}),e.languages.insertBefore("ruby","number",{builtin:/\b(?:Array|Bignum|Binding|Class|Continuation|Dir|Exception|FalseClass|File|Stat|Fixnum|Float|Hash|Integer|IO|MatchData|Method|Module|NilClass|Numeric|Object|Proc|Range|Regexp|String|Struct|TMS|Symbol|ThreadGroup|Thread|Time|TrueClass)\b/,constant:/\b[A-Z]\w*(?:[?!]|\b)/}),e.languages.ruby.string=[{pattern:/%[qQiIwWxs]?([^a-zA-Z0-9\s{(\[<])(?:(?!\1)[^\\]|\\[\s\S])*\1/,greedy:!0,inside:{interpolation:n}},{pattern:/%[qQiIwWxs]?\((?:[^()\\]|\\[\s\S])*\)/,greedy:!0,inside:{interpolation:n}},{pattern:/%[qQiIwWxs]?\{(?:[^#{}\\]|#(?:\{[^}]+\})?|\\[\s\S])*\}/,greedy:!0,inside:{interpolation:n}},{pattern:/%[qQiIwWxs]?\[(?:[^\[\]\\]|\\[\s\S])*\]/,greedy:!0,inside:{interpolation:n}},{pattern:/%[qQiIwWxs]?<(?:[^<>\\]|\\[\s\S])*>/,greedy:!0,inside:{interpolation:n}},{pattern:/("|')(?:#\{[^}]+\}|\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,greedy:!0,inside:{interpolation:n}}],e.languages.rb=e.languages.ruby}(Prism);
\ No newline at end of file
diff --git a/tests/languages/ruby/method_definition_feature.test b/tests/languages/ruby/method_definition_feature.test
index ee8b5ec530..087ce8bc21 100644
--- a/tests/languages/ruby/method_definition_feature.test
+++ b/tests/languages/ruby/method_definition_feature.test
@@ -32,7 +32,7 @@ end
   "diameter",
   ["punctuation", ")"],
   ["keyword", "new"],
-  ["class-name", ["diameter"]],
+  " diameter ",
   ["operator", "/"],
   ["number", "2"],
   ["keyword", "end"],