diff --git a/app.coffee b/app.coffee
index c44a8a1..dbca788 100644
--- a/app.coffee
+++ b/app.coffee
@@ -5,10 +5,17 @@ harp = require 'harp'
 path = require 'path'
 ical = require 'ical-generator'
 redis = require 'redis'
+raven = require 'raven'
 _ = require 'underscore'
 
 config = require './config'
 
+if config.sentry != 'sentry-api-key'
+  sentry = new raven.Client config.sentry
+  sentry.patchGlobal()
+else
+  sentry = null
+
 redis_client = redis.createClient()
 
 sendRequest = (path, callback) ->
@@ -77,8 +84,12 @@ app.get '/:username', (req, res) ->
             cal.addEvent commit
 
       console.log "Request by: #{username}, X-RateLimit-Remaining: #{_res.headers['x-ratelimit-remaining']}"
+      sentry?.captureMessage username
 
       res.header 'Content-Type', 'text/calendar; charset=utf-8'
       res.status(200).end(cal.toString())
 
+if config.sentry != 'sentry-api-key'
+  app.use raven.middleware.express config.sentry
+
 app.listen 19864
diff --git a/config.coffee b/config.coffee
index 3de6686..1379b60 100644
--- a/config.coffee
+++ b/config.coffee
@@ -2,3 +2,5 @@ module.exports =
   auth:
     user: 'username'
     pass: 'personal-access-tokens'
+
+  sentry: 'sentry-api-key'
diff --git a/package.json b/package.json
index e958074..8c42f56 100644
--- a/package.json
+++ b/package.json
@@ -19,13 +19,14 @@
     "start": "./node_modules/.bin/coffee app.coffee"
   },
   "dependencies": {
+    "async": "^0.9.0",
     "coffee-script": "^1.7.1",
     "express": "^4.10.0",
-    "request": "^2.47.0",
-    "ical-generator": "^0.1.9",
     "harp": "^0.14.0",
-    "async": "^0.9.0",
-    "underscore": "^1.7.0",
-    "redis": "^0.12.1"
+    "ical-generator": "^0.1.9",
+    "raven": "^0.7.3",
+    "redis": "^0.12.1",
+    "request": "^2.47.0",
+    "underscore": "^1.7.0"
   }
 }