diff --git a/gerrit-gwtui/src/main/java/net/codemirror/mode/ModeInfo.java b/gerrit-gwtui/src/main/java/net/codemirror/mode/ModeInfo.java
index c439e109b3..9c82c0659e 100644
--- a/gerrit-gwtui/src/main/java/net/codemirror/mode/ModeInfo.java
+++ b/gerrit-gwtui/src/main/java/net/codemirror/mode/ModeInfo.java
@@ -37,49 +37,119 @@ public class ModeInfo extends JavaScriptObject {
 
   static {
     indexModes(new DataResource[] {
+      Modes.I.apl(),
+      Modes.I.asciiarmor(),
+      Modes.I.asn_1(),
+      Modes.I.asterisk(),
+      Modes.I.brainfuck(),
       Modes.I.clike(),
       Modes.I.clojure(),
+      Modes.I.cmake(),
+      Modes.I.cobol(),
       Modes.I.coffeescript(),
       Modes.I.commonlisp(),
+      Modes.I.crystal(),
       Modes.I.css(),
+      Modes.I.cypher(),
       Modes.I.d(),
       Modes.I.dart(),
       Modes.I.diff(),
+      Modes.I.django(),
       Modes.I.dockerfile(),
       Modes.I.dtd(),
+      Modes.I.dylan(),
+      Modes.I.ebnf(),
+      Modes.I.ecl(),
+      Modes.I.eiffel(),
+      Modes.I.elm(),
       Modes.I.erlang(),
+      Modes.I.factor(),
+      Modes.I.fcl(),
+      Modes.I.forth(),
+      Modes.I.fortran(),
       Modes.I.gas(),
       Modes.I.gerrit_commit(),
       Modes.I.gfm(),
+      Modes.I.gherkin(),
       Modes.I.go(),
       Modes.I.groovy(),
+      Modes.I.haml(),
+      Modes.I.handlebars(),
+      Modes.I.haskell_literate(),
       Modes.I.haskell(),
+      Modes.I.haxe(),
+      Modes.I.htmlembedded(),
       Modes.I.htmlmixed(),
+      Modes.I.http(),
+      Modes.I.idl(),
+      Modes.I.jade(),
       Modes.I.javascript(),
+      Modes.I.jinja2(),
+      Modes.I.jsx(),
+      Modes.I.julia(),
+      Modes.I.livescript(),
       Modes.I.lua(),
       Modes.I.markdown(),
+      Modes.I.mathematica(),
+      Modes.I.mirc(),
+      Modes.I.mllike(),
+      Modes.I.modelica(),
+      Modes.I.mscgen(),
+      Modes.I.mumps(),
+      Modes.I.nginx(),
+      Modes.I.nsis(),
+      Modes.I.ntriples(),
+      Modes.I.octave(),
+      Modes.I.oz(),
+      Modes.I.pascal(),
+      Modes.I.pegjs(),
       Modes.I.perl(),
       Modes.I.php(),
       Modes.I.pig(),
       Modes.I.properties(),
+      Modes.I.protobuf(),
       Modes.I.puppet(),
       Modes.I.python(),
+      Modes.I.q(),
       Modes.I.r(),
+      Modes.I.rpm(),
       Modes.I.rst(),
       Modes.I.ruby(),
+      Modes.I.rust(),
       Modes.I.scheme(),
       Modes.I.shell(),
       Modes.I.smalltalk(),
+      Modes.I.smarty(),
+      Modes.I.solr(),
       Modes.I.soy(),
+      Modes.I.sparql(),
+      Modes.I.spreadsheet(),
       Modes.I.sql(),
       Modes.I.stex(),
+      Modes.I.stylus(),
       Modes.I.swift(),
       Modes.I.tcl(),
+      Modes.I.textile(),
+      Modes.I.tiddlywiki(),
+      Modes.I.tiki(),
+      Modes.I.toml(),
+      Modes.I.tornado(),
+      Modes.I.troff(),
+      Modes.I.ttcn_cfg(),
+      Modes.I.ttcn(),
+      Modes.I.turtle(),
+      Modes.I.twig(),
+      Modes.I.vb(),
+      Modes.I.vbscript(),
       Modes.I.velocity(),
       Modes.I.verilog(),
       Modes.I.vhdl(),
+      Modes.I.vue(),
       Modes.I.xml(),
+      Modes.I.xquery(),
+      Modes.I.yaml_frontmatter(),
       Modes.I.yaml(),
+      Modes.I.z80(),
     });
 
     alias("application/x-httpd-php-open", "application/x-httpd-php");
diff --git a/gerrit-gwtui/src/main/java/net/codemirror/mode/Modes.java b/gerrit-gwtui/src/main/java/net/codemirror/mode/Modes.java
index 4faaccf2bf..593dc294b9 100644
--- a/gerrit-gwtui/src/main/java/net/codemirror/mode/Modes.java
+++ b/gerrit-gwtui/src/main/java/net/codemirror/mode/Modes.java
@@ -22,49 +22,122 @@ import com.google.gwt.resources.client.DataResource.DoNotEmbed;
 public interface Modes extends ClientBundle {
   public static final Modes I = GWT.create(Modes.class);
 
+  @Source("apl.js") @DoNotEmbed DataResource apl();
+  @Source("asciiarmor.js") @DoNotEmbed DataResource asciiarmor();
+  @Source("asn.1.js") @DoNotEmbed DataResource asn_1();
+  @Source("asterisk.js") @DoNotEmbed DataResource asterisk();
+  @Source("brainfuck.js") @DoNotEmbed DataResource brainfuck();
   @Source("clike.js") @DoNotEmbed DataResource clike();
   @Source("clojure.js") @DoNotEmbed DataResource clojure();
+  @Source("cmake.js") @DoNotEmbed DataResource cmake();
+  @Source("cobol.js") @DoNotEmbed DataResource cobol();
   @Source("coffeescript.js") @DoNotEmbed DataResource coffeescript();
   @Source("commonlisp.js") @DoNotEmbed DataResource commonlisp();
+  @Source("crystal.js") @DoNotEmbed DataResource crystal();
   @Source("css.js") @DoNotEmbed DataResource css();
+  @Source("cypher.js") @DoNotEmbed DataResource cypher();
   @Source("d.js") @DoNotEmbed DataResource d();
   @Source("dart.js") @DoNotEmbed DataResource dart();
   @Source("diff.js") @DoNotEmbed DataResource diff();
+  @Source("django.js") @DoNotEmbed DataResource django();
   @Source("dockerfile.js") @DoNotEmbed DataResource dockerfile();
   @Source("dtd.js") @DoNotEmbed DataResource dtd();
+  @Source("dylan.js") @DoNotEmbed DataResource dylan();
+  @Source("ebnf.js") @DoNotEmbed DataResource ebnf();
+  @Source("ecl.js") @DoNotEmbed DataResource ecl();
+  @Source("eiffel.js") @DoNotEmbed DataResource eiffel();
+  @Source("elm.js") @DoNotEmbed DataResource elm();
   @Source("erlang.js") @DoNotEmbed DataResource erlang();
+  @Source("factor.js") @DoNotEmbed DataResource factor();
+  @Source("fcl.js") @DoNotEmbed DataResource fcl();
+  @Source("forth.js") @DoNotEmbed DataResource forth();
+  @Source("fortran.js") @DoNotEmbed DataResource fortran();
   @Source("gas.js") @DoNotEmbed DataResource gas();
   @Source("gerrit/commit.js") @DoNotEmbed DataResource gerrit_commit();
   @Source("gfm.js") @DoNotEmbed DataResource gfm();
+  @Source("gherkin.js") @DoNotEmbed DataResource gherkin();
   @Source("go.js") @DoNotEmbed DataResource go();
   @Source("groovy.js") @DoNotEmbed DataResource groovy();
+  @Source("haml.js") @DoNotEmbed DataResource haml();
+  @Source("handlebars.js") @DoNotEmbed DataResource handlebars();
+  @Source("haskell-literate.js") @DoNotEmbed DataResource haskell_literate();
   @Source("haskell.js") @DoNotEmbed DataResource haskell();
+  @Source("haxe.js") @DoNotEmbed DataResource haxe();
+  @Source("htmlembedded.js") @DoNotEmbed DataResource htmlembedded();
   @Source("htmlmixed.js") @DoNotEmbed DataResource htmlmixed();
+  @Source("http.js") @DoNotEmbed DataResource http();
+  @Source("idl.js") @DoNotEmbed DataResource idl();
+  @Source("jade.js") @DoNotEmbed DataResource jade();
   @Source("javascript.js") @DoNotEmbed DataResource javascript();
+  @Source("jinja2.js") @DoNotEmbed DataResource jinja2();
+  @Source("jsx.js") @DoNotEmbed DataResource jsx();
+  @Source("julia.js") @DoNotEmbed DataResource julia();
+  @Source("livescript.js") @DoNotEmbed DataResource livescript();
   @Source("lua.js") @DoNotEmbed DataResource lua();
   @Source("markdown.js") @DoNotEmbed DataResource markdown();
+  @Source("mathematica.js") @DoNotEmbed DataResource mathematica();
+  @Source("mirc.js") @DoNotEmbed DataResource mirc();
+  @Source("mllike.js") @DoNotEmbed DataResource mllike();
+  @Source("modelica.js") @DoNotEmbed DataResource modelica();
+  @Source("mscgen.js") @DoNotEmbed DataResource mscgen();
+  @Source("mumps.js") @DoNotEmbed DataResource mumps();
+  @Source("nginx.js") @DoNotEmbed DataResource nginx();
+  @Source("nsis.js") @DoNotEmbed DataResource nsis();
+  @Source("ntriples.js") @DoNotEmbed DataResource ntriples();
+  @Source("octave.js") @DoNotEmbed DataResource octave();
+  @Source("oz.js") @DoNotEmbed DataResource oz();
+  @Source("pascal.js") @DoNotEmbed DataResource pascal();
+  @Source("pegjs.js") @DoNotEmbed DataResource pegjs();
   @Source("perl.js") @DoNotEmbed DataResource perl();
   @Source("php.js") @DoNotEmbed DataResource php();
   @Source("pig.js") @DoNotEmbed DataResource pig();
   @Source("properties.js") @DoNotEmbed DataResource properties();
+  @Source("protobuf.js") @DoNotEmbed DataResource protobuf();
   @Source("puppet.js") @DoNotEmbed DataResource puppet();
   @Source("python.js") @DoNotEmbed DataResource python();
+  @Source("q.js") @DoNotEmbed DataResource q();
   @Source("r.js") @DoNotEmbed DataResource r();
+  @Source("rpm.js") @DoNotEmbed DataResource rpm();
   @Source("rst.js") @DoNotEmbed DataResource rst();
   @Source("ruby.js") @DoNotEmbed DataResource ruby();
+  @Source("rust.js") @DoNotEmbed DataResource rust();
+  @Source("sass.js") @DoNotEmbed DataResource sass();
   @Source("scheme.js") @DoNotEmbed DataResource scheme();
   @Source("shell.js") @DoNotEmbed DataResource shell();
+  @Source("sieve.js") @DoNotEmbed DataResource sieve();
+  @Source("slim.js") @DoNotEmbed DataResource slim();
   @Source("smalltalk.js") @DoNotEmbed DataResource smalltalk();
-  @Source("swift.js") @DoNotEmbed DataResource swift();
+  @Source("smarty.js") @DoNotEmbed DataResource smarty();
+  @Source("solr.js") @DoNotEmbed DataResource solr();
   @Source("soy.js") @DoNotEmbed DataResource soy();
+  @Source("sparql.js") @DoNotEmbed DataResource sparql();
+  @Source("spreadsheet.js") @DoNotEmbed DataResource spreadsheet();
   @Source("sql.js") @DoNotEmbed DataResource sql();
   @Source("stex.js") @DoNotEmbed DataResource stex();
+  @Source("stylus.js") @DoNotEmbed DataResource stylus();
+  @Source("swift.js") @DoNotEmbed DataResource swift();
   @Source("tcl.js") @DoNotEmbed DataResource tcl();
+  @Source("textile.js") @DoNotEmbed DataResource textile();
+  @Source("tiddlywiki.js") @DoNotEmbed DataResource tiddlywiki();
+  @Source("tiki.js") @DoNotEmbed DataResource tiki();
+  @Source("toml.js") @DoNotEmbed DataResource toml();
+  @Source("tornado.js") @DoNotEmbed DataResource tornado();
+  @Source("troff.js") @DoNotEmbed DataResource troff();
+  @Source("ttcn-cfg.js") @DoNotEmbed DataResource ttcn_cfg();
+  @Source("ttcn.js") @DoNotEmbed DataResource ttcn();
+  @Source("turtle.js") @DoNotEmbed DataResource turtle();
+  @Source("twig.js") @DoNotEmbed DataResource twig();
+  @Source("vb.js") @DoNotEmbed DataResource vb();
+  @Source("vbscript.js") @DoNotEmbed DataResource vbscript();
   @Source("velocity.js") @DoNotEmbed DataResource velocity();
   @Source("verilog.js") @DoNotEmbed DataResource verilog();
   @Source("vhdl.js") @DoNotEmbed DataResource vhdl();
+  @Source("vue.js") @DoNotEmbed DataResource vue();
   @Source("xml.js") @DoNotEmbed DataResource xml();
+  @Source("xquery.js") @DoNotEmbed DataResource xquery();
+  @Source("yaml-frontmatter.js") @DoNotEmbed DataResource yaml_frontmatter();
   @Source("yaml.js") @DoNotEmbed DataResource yaml();
+  @Source("z80.js") @DoNotEmbed DataResource z80();
 
   // When adding a resource, update static initializer in ModeInfo.
 }
diff --git a/gerrit-server/src/main/resources/com/google/gerrit/server/mime/mime-types.properties b/gerrit-server/src/main/resources/com/google/gerrit/server/mime/mime-types.properties
index 823455d1f3..fa3fb8d774 100644
--- a/gerrit-server/src/main/resources/com/google/gerrit/server/mime/mime-types.properties
+++ b/gerrit-server/src/main/resources/com/google/gerrit/server/mime/mime-types.properties
@@ -1,57 +1,246 @@
+apl = text/apl
 as = text/x-gas
+asn = text/x-ttcn-asn
+asn1 = text/x-ttcn-asn
+asp = application/x-aspx
+aspx = application/x-aspx
+asterisk = text/x-asterisk
+b = text/x-brainfuck
+bash = text/x-sh
+bf = text/x-brainfuck
+bnf = text/x-ebnf
 bucklet = text/x-python
+bzl = text/x-python
 BUCK = text/x-python
-clj = text/x-clojure
+BUILD = text/x-python
+c = text/x-csrc
+cfg = text/x-ttcn-cfg
 cl = text/x-common-lisp
+clj = text/x-clojure
+cljs = text/x-clojurescript
+cmake = text/x-cmake
+cmake.in = text/x-cmake
+contributing.md = text/x-gfm
+CMakeLists.txt = text/x-cmake
+CONTRIBUTING.md = text/x-gfm
+cob = text/x-cobol
 coffee = text/x-coffeescript
+conf = text/plain
+cpy = text/x-cobol
+cr = text/x-crystal
 cs = text/x-csharp
+csharp = text/x-csharp
+css = text/css
 cpp = text/x-c++src
+cql = text/x-cassandra
 cxx = text/x-c++src
+cyp = application/x-cypher-query
+cypher = application/x-cypher-query
+c++ = text/x-c++src
 d = text/x-d
 dart = application/dart
+def = text/plain
 defs = text/x-python
 diff = text/x-diff
+django = text/x-django
+dtd = application/xml-dtd
+dyalog = text/apl
+dyl = text/x-dylan
+dylan = text/x-dylan
 Dockerfile = text/x-dockerfile
 dtd = application/xml-dtd
+e = text/x-eiffel
+ebnf = text/x-ebnf
+ecl = text/x-ecl
 el = text/x-common-lisp
+elm = text/x-elm
+ejs = application/x-ejs
+erb = application/x-erb
 erl = text/x-erlang
+es6 = text/jsx
+excel = text/x-spreadsheet
+extensions.conf = text/x-asterisk
+f = text/x-fortran
+factor = text/x-factor
+feathre = text/x-feature
+fcl = text/x-fcl
+for = text/x-fortran
+formula = text/x-spreadsheet
+forth = text/x-forth
+fth = text/x-forth
 frag = x-shader/x-fragment
+fs = text/x-fsharp
+fsharp = text/x-fsharp
+f77 = text/x-fortran
+f90 = text/x-fortran
 gitmodules = text/x-ini
 glsl = x-shader/x-vertex
 go = text/x-go
 gradle = text/x-groovy
 groovy = text/x-groovy
-hs = text/x-haskell
+gss = text/x-gss
+h = text/x-csrc
+haml = text/x-haml
+hh = text/x-c++src
+history.md = text/x-gfm
 hpp = text/x-c++src
+hs = text/x-haskell
+htm = text/html
+html = text/html
+http = message/http
+hx = text/x-haxe
+hxml = text/x-hxml
 hxx = text/x-c++src
+h++ = text/x-c++src
+HISTORY.md = text/x-gfm
+in = text/x-properties
+ini = text/x-properties
+intr = text/x-dylan
+jade = text/x-jade
+java = text/x-java
+jl = text/x-julia
+jruby = text/x-ruby
+js = text/javascript
+json = application/json
+jsonld = application/ld+json
+jsx = text/jsx
+jsp = application/x-jsp
+kt = text/x-kotlin
+less = text/x-less
+lhs = text/x-literate-haskell
 lisp = text/x-common-lisp
+list = text/plain
+log = text/plain
+ls = text/x-livescript
 lsp = text/x-common-lisp
 lua = text/x-lua
 m = text/x-objectivec
+macruby = text/x-ruby
+map = application/json
+markdown = text/x-markdown
 md = text/x-markdown
+mirc = text/mirc
+mkd = text/x-markdown
+ml = text/x-ocaml
+mli = text/x-ocaml
+mll = text/x-ocaml
+mly = text/x-ocaml
+mm = text/x-objectivec
+mo = text/x-modelica
+mps = text/x-mumps
+msc = text/x-mscgen
+mscgen = text/x-mscgen
+mscin = text/x-mscgen
+msgenny = text/x-msgenny
+nb = text/x-mathematica
+nginx.conf = text/x-nginx-conf
+nsh = text/x-nsis
+nsi = text/x-nsis
+nt = text/n-triples
+nut = text/x-squirrel
+oz = text/x-oz
+p = text/x-pascal
+pas = text/x-pascal
 patch = text/x-diff
+pgp = application/pgp
 php = text/x-php
+php3 = text/x-php
+php4 = text/x-php
+php5 = text/x-php
+phtml = text/x-php
 pig = text/x-pig
 pl = text/x-perl
+pls = text/x-plsql
 pm = text/x-perl
 pp = text/x-puppet
+pro = text/x-idl
 project.config = text/x-ini
 properties = text/x-ini
+proto = text/x-protobuf
+protobuf = text/x-protobuf
 py = text/x-python
+pyw = text/x-python
+pyx = text/x-cython
+pxd = text/x-cython
+pxi = text/x-cython
+PKGBUILD = text/x-sh
+q = text/x-q
 r = text/r-src
+rake = text/x-ruby
 rb = text/x-ruby
+rbx = text/x-ruby
+readme.md = text/x-gfm
 rng = application/xml
+rpm = text/x-rpm-changes
+rq = application/sparql-query
+rs = text/x-rustsrc
+rss = application/xml
 rst = text/x-rst
+README.md = text/x-gfm
+s = text/x-gas
+sass = text/x-sass
 scala = text/x-scala
+scm = text/x-scheme
+scss = text/x-scss
+sh = text/x-sh
+sieve = application/sieve
+siv = application/sieve
+slim = text/x-slim
+solr = text/x-solr
 soy = text/x-soy
+sparql = application/sparql-query
+sparul = applicatoin/sparql-query
+spec = text/x-rpm-spec
+spreadsheet = text/x-spreadsheet
+sql = text/x-sql
+ss = text/x-scheme
 st = text/x-stsrc
 stex = text/x-stex
 swift = text/x-swift
 tcl = text/x-tcl
+tex = text/x-latex
+text = text/plain
+textile = text/x-textile
+tiddly = text/x-tiddlywiki
+tiddlywiki = text/x-tiddlywiki
+tiki = text/tiki
+toml = text/x-toml
+tpl = text/x-smarty
+ts = application/typescript
+ttcn = text/x-ttcn
+ttcnpp = text/x-ttcn
+ttcn3 = text/x-ttcn
+ttl = text/turtle
+txt = text/plain
+twig = text/x-twig
 v = text/x-verilog
+vb = text/x-vb
+vbs = text/vbscript
 vert = x-shader/x-vertex
 vh = text/x-verilog
+vhd = text/x-vhdl
 vhdl = text/x-vhdl
 vm = text/velocity
+vtl = text/velocity
+wsdl = application/xml
+xhtml = text/html
+xml = application/xml
+xsd = application/xml
+xsl = application/xml
+xquery = application/xquery
+xu = text/x-xu
+xy = application/xquery
 yaml = text/x-yaml
 yml = text/x-yaml
+zsh = text/x-sh
+z80 = text/x-z80
+1 = text/troff
+2 = text/troff
+3 = text/troff
+4 = text/troff
+4th = text/x-forth
+5 = text/troff
+6 = text/troff
+7 = text/troff
+8 = text/troff
+9 = text/troff
diff --git a/lib/codemirror/BUCK b/lib/codemirror/BUCK
index 9fa905a7f3..6e2544f9d3 100644
--- a/lib/codemirror/BUCK
+++ b/lib/codemirror/BUCK
@@ -3,8 +3,8 @@ include_defs('//lib/codemirror/cm.defs')
 include_defs('//lib/codemirror/closure.defs')
 
 REPO = MAVEN_CENTRAL
-VERSION = '5.8'
-SHA1 = '1cbe267adf1da9659dae49253305649dae2391e9'
+VERSION = '5.13'
+SHA1 = '4888b4e7dde6822ff5f688f5f89c84fd7cf5a764'
 
 if REPO == MAVEN_CENTRAL:
   URL = REPO + 'org/webjars/codemirror/%s/codemirror-%s.jar' % (VERSION, VERSION)
diff --git a/lib/codemirror/cm.defs b/lib/codemirror/cm.defs
index f9700486b6..a9db084bb5 100644
--- a/lib/codemirror/cm.defs
+++ b/lib/codemirror/cm.defs
@@ -44,46 +44,119 @@ CM_THEMES = [
 # gerrit-gwtui/src/main/java/net/codemirror/mode/ModeInfo.java,
 # and in CodeMirror's own mode/meta.js script.
 CM_MODES = [
+  'apl',
+  'asciiarmor',
+  'asn.1',
+  'asterisk',
+  'brainfuck',
   'clike',
   'clojure',
+  'cmake',
+  'cobol',
   'coffeescript',
   'commonlisp',
+  'crystal',
   'css',
+  'cypher',
   'd',
   'dart',
   'diff',
+  'django',
   'dockerfile',
   'dtd',
+  'dylan',
+  'ebnf',
+  'ecl',
+  'eiffel',
+  'elm',
   'erlang',
+  'factor',
+  'fcl',
+  'forth',
+  'fortran',
   'gas',
   'gfm',
+  'gherkin',
   'go',
   'groovy',
+  'haml',
+  'handlebars',
+  'haskell-literate',
   'haskell',
+  'haxe',
+  'htmlembedded',
   'htmlmixed',
+  'http',
+  'idl',
+  'jade',
   'javascript',
+  'jinja2',
+  'jsx',
+  'julia',
+  'livescript',
   'lua',
   'markdown',
+  'mathematica',
+  'mirc',
+  'mllike',
+  'modelica',
+  'mscgen',
+  'mumps',
+  'nginx',
+  'nsis',
+  'ntriples',
+  'octave',
+  'oz',
+  'pascal',
+  'pegjs',
   'perl',
   'php',
   'pig',
   'properties',
+  'protobuf',
   'puppet',
   'python',
+  'q',
   'r',
+  'rpm',
   'rst',
   'ruby',
+  'rust',
+  'sass',
   'scheme',
   'shell',
+  'sieve',
+  'slim',
   'smalltalk',
+  'smarty',
+  'solr',
   'soy',
+  'sparql',
+  'spreadsheet',
   'sql',
   'stex',
+  'stylus',
   'swift',
   'tcl',
+  'textile',
+  'tiddlywiki',
+  'tiki',
+  'toml',
+  'tornado',
+  'troff',
+  'ttcn-cfg',
+  'ttcn',
+  'turtle',
+  'twig',
+  'vb',
+  'vbscript',
   'velocity',
   'verilog',
   'vhdl',
+  'vue',
   'xml',
+  'xquery',
+  'yaml-frontmatter',
   'yaml',
+  'z80',
 ]