diff --git a/.holo/sources/laddr.toml b/.holo/sources/laddr.toml
index 3d2fdd89..ae1d2eb1 100644
--- a/.holo/sources/laddr.toml
+++ b/.holo/sources/laddr.toml
@@ -1,3 +1,3 @@
 [holosource]
 url = "https://github.com/CodeForPhilly/laddr"
-ref = "refs/tags/v3.1.0"
+ref = "refs/tags/v3.1.4"
diff --git a/event-handlers/Laddr/Project/afterRecordSave/slack-announce.php b/event-handlers/Laddr/Project/afterRecordSave/slack-announce.php
index 8c76bd02..6b3327d9 100644
--- a/event-handlers/Laddr/Project/afterRecordSave/slack-announce.php
+++ b/event-handlers/Laddr/Project/afterRecordSave/slack-announce.php
@@ -6,6 +6,10 @@
     return;
 }
 
+if (!Emergence\Slack\API::isAvailable()) {
+    return;
+}
+
 $attachment = [
     'pretext' => ':construction: A new project has been posted!',
     'title' => $Project->getTitle(),
diff --git a/event-handlers/Laddr/ProjectUpdate/afterRecordSave/slack-announce.php b/event-handlers/Laddr/ProjectUpdate/afterRecordSave/slack-announce.php
index be180dbc..13d5fc59 100644
--- a/event-handlers/Laddr/ProjectUpdate/afterRecordSave/slack-announce.php
+++ b/event-handlers/Laddr/ProjectUpdate/afterRecordSave/slack-announce.php
@@ -8,6 +8,10 @@
     return;
 }
 
+if (!Emergence\Slack\API::isAvailable()) {
+    return;
+}
+
 $attachment = [
     'pretext' => ':tada: New project update!',
     'title' => $ProjectUpdate->getTitle(),
diff --git a/habitat/plan.sh b/habitat/plan.sh
index 8beddd65..28960c7b 100644
--- a/habitat/plan.sh
+++ b/habitat/plan.sh
@@ -2,6 +2,7 @@ pkg_name=site
 pkg_origin=codeforphilly
 pkg_maintainer="Code for Philly <hello@codeforphilly.org>"
 pkg_scaffolding=emergence/scaffolding-site
+pkg_deps=(jarvus/mjml)
 
 pkg_version() {
   scaffolding_detect_pkg_version