diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 905a0575f..4b3c9ff1a 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -709,7 +709,7 @@
       "dependencies": {
         "lru-cache": {
           "version": "4.0.2",
-          "from": "lru-cache@>=4.0.1 <5.0.0",
+          "from": "lru-cache@^4.0.1",
           "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.0.2.tgz"
         }
       }
@@ -757,7 +757,7 @@
       "dependencies": {
         "object-assign": {
           "version": "4.1.0",
-          "from": "object-assign@>=4.0.1 <5.0.0",
+          "from": "object-assign@^4.0.1",
           "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.0.tgz",
           "dev": true
         },
@@ -838,7 +838,7 @@
     },
     "debug": {
       "version": "2.6.0",
-      "from": "debug@2.6.0",
+      "from": "debug@>=2.2.0 <3.0.0",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.0.tgz",
       "dependencies": {
         "ms": {
@@ -1373,7 +1373,7 @@
       "dependencies": {
         "object-assign": {
           "version": "4.1.0",
-          "from": "object-assign@>=4.1.0 <5.0.0",
+          "from": "object-assign@^4.1.0",
           "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.0.tgz"
         },
         "supports-color": {
@@ -1475,7 +1475,7 @@
         },
         "through2": {
           "version": "0.6.5",
-          "from": "through2@>=0.6.1 <0.7.0",
+          "from": "through2@^0.6.1",
           "resolved": "https://registry.npmjs.org/through2/-/through2-0.6.5.tgz",
           "dev": true
         }
@@ -1519,7 +1519,7 @@
         },
         "minimatch": {
           "version": "3.0.3",
-          "from": "minimatch@>=2.0.0 <3.0.0||>=3.0.0 <4.0.0",
+          "from": "minimatch@2 || 3",
           "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.3.tgz",
           "dev": true
         }
@@ -1593,7 +1593,7 @@
       "dependencies": {
         "minimist": {
           "version": "1.2.0",
-          "from": "minimist@>=1.1.0 <2.0.0",
+          "from": "minimist@^1.1.0",
           "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
           "dev": true
         }
@@ -1631,7 +1631,7 @@
         },
         "through2": {
           "version": "0.6.5",
-          "from": "through2@>=0.6.2 <0.7.0",
+          "from": "through2@^0.6.2",
           "resolved": "https://registry.npmjs.org/through2/-/through2-0.6.5.tgz",
           "dev": true
         },
@@ -1677,7 +1677,7 @@
       "dependencies": {
         "object-assign": {
           "version": "4.1.0",
-          "from": "object-assign@>=4.0.1 <5.0.0",
+          "from": "object-assign@^4.0.1",
           "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.0.tgz",
           "dev": true
         }
@@ -1709,7 +1709,7 @@
         },
         "minimist": {
           "version": "1.2.0",
-          "from": "minimist@>=1.1.0 <2.0.0",
+          "from": "minimist@^1.1.0",
           "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
           "dev": true
         },
@@ -1838,7 +1838,7 @@
         },
         "source-map": {
           "version": "0.4.4",
-          "from": "source-map@>=0.4.4 <0.5.0",
+          "from": "source-map@^0.4.4",
           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
           "dev": true
         }
@@ -2177,7 +2177,7 @@
         },
         "minimatch": {
           "version": "3.0.3",
-          "from": "minimatch@>=2.0.0 <3.0.0||>=3.0.0 <4.0.0",
+          "from": "minimatch@2 || 3",
           "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.3.tgz",
           "dev": true
         },
@@ -2622,12 +2622,12 @@
       "dependencies": {
         "minimist": {
           "version": "1.2.0",
-          "from": "minimist@>=1.1.3 <2.0.0",
+          "from": "minimist@^1.1.3",
           "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz"
         },
         "object-assign": {
           "version": "4.1.0",
-          "from": "object-assign@>=4.0.1 <5.0.0",
+          "from": "object-assign@^4.0.1",
           "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.0.tgz"
         }
       }
@@ -2698,7 +2698,7 @@
         },
         "minimatch": {
           "version": "3.0.3",
-          "from": "minimatch@>=3.0.2 <4.0.0",
+          "from": "minimatch@^3.0.2",
           "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.3.tgz",
           "dev": true
         },
@@ -2881,7 +2881,7 @@
       "dependencies": {
         "glob": {
           "version": "7.1.1",
-          "from": "glob@>=7.0.3 <8.0.0",
+          "from": "glob@^7.0.3",
           "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.1.tgz"
         },
         "graceful-fs": {
@@ -2891,7 +2891,7 @@
         },
         "minimatch": {
           "version": "3.0.3",
-          "from": "minimatch@>=3.0.2 <4.0.0",
+          "from": "minimatch@^3.0.2",
           "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.3.tgz"
         }
       }
@@ -2910,7 +2910,7 @@
         },
         "glob": {
           "version": "7.1.1",
-          "from": "glob@>=7.0.3 <8.0.0",
+          "from": "glob@^7.0.3",
           "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.1.tgz",
           "dev": true
         },
@@ -2922,19 +2922,19 @@
         },
         "lodash": {
           "version": "4.16.6",
-          "from": "lodash@>=4.16.4 <4.17.0",
+          "from": "lodash@~4.16.4",
           "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.16.6.tgz",
           "dev": true
         },
         "minimatch": {
           "version": "3.0.3",
-          "from": "minimatch@>=3.0.2 <3.1.0",
+          "from": "minimatch@~3.0.2",
           "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.3.tgz",
           "dev": true
         },
         "nan": {
           "version": "2.5.0",
-          "from": "nan@>=2.3.2 <3.0.0",
+          "from": "nan@^2.3.2",
           "resolved": "https://registry.npmjs.org/nan/-/nan-2.5.0.tgz",
           "dev": true
         }
@@ -2995,7 +2995,7 @@
       "dependencies": {
         "object-assign": {
           "version": "4.1.0",
-          "from": "object-assign@>=4.0.1 <5.0.0",
+          "from": "object-assign@^4.0.1",
           "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.0.tgz",
           "dev": true
         }
@@ -3583,7 +3583,7 @@
       "dependencies": {
         "object-assign": {
           "version": "4.1.0",
-          "from": "object-assign@>=4.0.1 <5.0.0",
+          "from": "object-assign@^4.0.1",
           "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.0.tgz",
           "dev": true
         },
@@ -3969,7 +3969,7 @@
       "dependencies": {
         "object-assign": {
           "version": "4.1.0",
-          "from": "object-assign@>=4.1.0 <5.0.0",
+          "from": "object-assign@^4.1.0",
           "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.0.tgz",
           "dev": true
         }
@@ -4136,12 +4136,12 @@
       "dependencies": {
         "glob": {
           "version": "7.1.1",
-          "from": "glob@>=7.0.5 <8.0.0",
+          "from": "glob@^7.0.5",
           "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.1.tgz"
         },
         "minimatch": {
           "version": "3.0.3",
-          "from": "minimatch@>=3.0.2 <4.0.0",
+          "from": "minimatch@^3.0.2",
           "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.3.tgz"
         }
       }
@@ -4174,7 +4174,7 @@
         },
         "glob": {
           "version": "7.1.1",
-          "from": "glob@>=7.0.0 <8.0.0",
+          "from": "glob@^7.0.0",
           "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.1.tgz"
         },
         "lodash": {
@@ -4184,7 +4184,7 @@
         },
         "minimatch": {
           "version": "3.0.3",
-          "from": "minimatch@>=3.0.2 <4.0.0",
+          "from": "minimatch@^3.0.2",
           "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.3.tgz"
         },
         "window-size": {
@@ -4268,6 +4268,33 @@
         }
       }
     },
+    "showdown": {
+      "version": "1.6.0",
+      "from": "showdown@>=1.4.4 <2.0.0",
+      "resolved": "https://registry.npmjs.org/showdown/-/showdown-1.6.0.tgz",
+      "dependencies": {
+        "camelcase": {
+          "version": "3.0.0",
+          "from": "camelcase@>=3.0.0 <4.0.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz"
+        },
+        "cliui": {
+          "version": "3.2.0",
+          "from": "cliui@>=3.2.0 <4.0.0",
+          "resolved": "https://registry.npmjs.org/cliui/-/cliui-3.2.0.tgz"
+        },
+        "yargs": {
+          "version": "6.6.0",
+          "from": "yargs@>=6.6.0 <7.0.0",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-6.6.0.tgz"
+        },
+        "yargs-parser": {
+          "version": "4.2.1",
+          "from": "yargs-parser@>=4.2.0 <5.0.0",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-4.2.1.tgz"
+        }
+      }
+    },
     "sigmund": {
       "version": "1.0.1",
       "from": "sigmund@>=1.0.0 <1.1.0",
@@ -5713,7 +5740,7 @@
       "dependencies": {
         "camelcase": {
           "version": "3.0.0",
-          "from": "camelcase@>=3.0.0 <4.0.0",
+          "from": "camelcase@^3.0.0",
           "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz"
         }
       }
diff --git a/package.json b/package.json
index 9ef459356..3713122a6 100644
--- a/package.json
+++ b/package.json
@@ -59,6 +59,7 @@
     "proxy-middleware": "^0.13.0",
     "safetydance": "^0.1.1",
     "semver": "^4.3.6",
+    "showdown": "^1.6.0",
     "split": "^1.0.0",
     "superagent": "^1.8.3",
     "supererror": "^0.7.1",
diff --git a/src/mailer.js b/src/mailer.js
index 89d35dcb8..81e6f5291 100644
--- a/src/mailer.js
+++ b/src/mailer.js
@@ -44,6 +44,7 @@ var assert = require('assert'),
     path = require('path'),
     safe = require('safetydance'),
     settings = require('./settings.js'),
+    showdown = require('showdown'),
     smtpTransport = require('nodemailer-smtp-transport'),
     users = require('./user.js'),
     util = require('util'),