diff --git a/.travis.yml b/.travis.yml
index f8f7c4c5f4a13c251799d53c751ef0eb829e33c5..736a32281474094afb2d2e25a0c7e4076bc92c2f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ php:
 
 env:
   - VERSION=HEAD
-  - VERSION=3.2.0
+  - VERSION=3.3.0
   # The final CI slot should be used to test the update path from the oldest
   # available database fixture.
   - VERSION=1.0.0-rc2
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b536c6c574b15353cb0afded7dabca5dc99f6e4f..8e34fc9ddb5beb2ae5a4b072fb0f0158d08fabaf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,14 @@
+## 3.3.0
+* Updated Lightning Core to 3.5, which security updates Drupal core to 8.6.6.
+* Made the time steps in Lightning Scheduler's UI configurable. (Issue #2981050)
+* Fixed a bug in the Moderation History where the users and timestamps didn't
+  correctly correspond to the actual revisions. (Issue #3022898)
+* Updated Moderation Dashboard to its latest stable version.
+* Refactored underlying scheduler UI code to be less sensitive to time zones.
+* Added project namespaces to all stated dependencies. (Issue #2999322)
+* Changes were made to the internal testing infrastructure, but nothing that
+  will affect users of Lightning Workflow.
+
 ## 3.2.0
 * Many changes to internal testing code and infrastructure, but nothing that
   affects users of Lightning Workflow.
diff --git a/composer.json b/composer.json
index ecb1a2e6b6681d1577b6c94315cf01b54dfbe096..0a75de572ddff187922e2bd9eee14fa855b3ad2f 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
         "cweagans/composer-patches": "^1.6.4",
         "drupal-composer/drupal-scaffold": "^2.0.0",
         "drupal/diff": "^1.0",
-        "drupal/lightning_core": "3.x-dev",
+        "drupal/lightning_core": "^3.5",
         "drupal/moderation_dashboard": "^1.0",
         "drupal/moderation_sidebar": "^1.0",
         "oomphinc/composer-installers-extender": "^1.1"
diff --git a/tests/fixtures/3.3.0.php.gz b/tests/fixtures/3.3.0.php.gz
new file mode 100644
index 0000000000000000000000000000000000000000..1847d02e2b249cbffb287e6dd6ccf62d4c67a0da
Binary files /dev/null and b/tests/fixtures/3.3.0.php.gz differ