diff --git a/.travis.yml b/.travis.yml
index 471920a..f7f035f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,9 +14,9 @@ before_install:
 - echo -e "Host zeus.ugent.be\n\tStrictHostKeyChecking no\n" >> ~/.ssh/config
 - npm install
 script:
-- ZEUS_PRODUCTION=1 bundle exec nanoc
-- ZEUS_PRODUCTION=1 bundle exec nanoc check --deploy
+- bundle exec nanoc --env=prod
+- bundle exec nanoc --env=prod check --deploy
 after_success:
 - mv deploy_key ~/.ssh/id_rsa
 - chmod 600 ~/.ssh/id_rsa
-- '[[ $TRAVIS_PULL_REQUEST == "false" ]] && [[ $TRAVIS_BRANCH == "master" ]] && ZEUS_PRODUCTION=1 bundle exec nanoc deploy public'
+- '[[ $TRAVIS_PULL_REQUEST == "false" ]] && [[ $TRAVIS_BRANCH == "master" ]] && bundle exec nanoc --env=prod deploy public'
diff --git a/Gemfile b/Gemfile
index 3500262..e6ab6e6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 source 'https://rubygems.org'
 
-gem 'nanoc', '4.3.7'
+gem 'nanoc', '4.4.1'
 gem 'kramdown'
 gem 'coffee-script'
 gem 'sass'
diff --git a/Gemfile.lock b/Gemfile.lock
index 791ddf4..184c6f0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     adsf (1.2.1)
       rack (>= 1.0.0)
-    autoprefixer-rails (6.5.1.1)
+    autoprefixer-rails (6.5.3)
       execjs
     builder (3.2.2)
     coderay (1.1.1)
@@ -28,17 +28,17 @@ GEM
       shellany (~> 0.0)
       thor (>= 0.18.1)
     guard-compat (1.2.1)
-    guard-nanoc (2.1.0)
+    guard-nanoc (2.1.1)
       guard (~> 2.8)
       guard-compat (~> 1.0)
-      nanoc (~> 4.0)
+      nanoc (>= 4.3.8, < 5.0)
     hamster (3.0.0)
       concurrent-ruby (~> 1.0)
     highline (1.7.8)
     icalendar (2.4.1)
     json (2.0.2)
-    kramdown (1.12.0)
-    libv8 (3.16.14.15)
+    kramdown (1.13.0)
+    libv8 (3.16.14.17)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -46,7 +46,7 @@ GEM
     lumberjack (1.0.10)
     method_source (0.8.2)
     mini_portile2 (2.1.0)
-    nanoc (4.3.7)
+    nanoc (4.4.1)
       cri (~> 2.3)
       hamster (~> 3.0)
       parallel (~> 1.9)
@@ -93,7 +93,7 @@ DEPENDENCIES
   highline
   icalendar
   kramdown
-  nanoc (= 4.3.7)
+  nanoc (= 4.4.1)
   sass
   terminal-notifier-guard
   therubyracer
diff --git a/lib/helpers/environment.rb b/lib/helpers/environment.rb
index 4a33b6f..5e9280e 100644
--- a/lib/helpers/environment.rb
+++ b/lib/helpers/environment.rb
@@ -1,6 +1,6 @@
 module EnvironmentHelper
   def production?
-    ENV['ZEUS_PRODUCTION']
+    ENV['NANOC_ENV'] == 'prod'
   end
 
   def development?
diff --git a/nanoc.yaml b/nanoc.yaml
index 00051a2..66ddd4c 100644
--- a/nanoc.yaml
+++ b/nanoc.yaml
@@ -3,7 +3,11 @@ title: Zeus WPI
 author_name: ''
 author_uri: ''
 
-base_url: https://zeus.ugent.be
+base_url: http://localhost:3000
+
+environments:
+  prod:
+    base_url: https://zeus.ugent.be
 
 # The syntax to use for patterns in the Rules file. Can be either `"glob"`
 # (default) or `"legacy"`. The former will enable glob patterns, which behave