diff --git a/CHANGELOG b/CHANGELOG
index 502d0a1..ad46f37 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -146,3 +146,7 @@
 [1.7.3]
 * Update base image to 3.2.0
 
+[1.7.4]
+* Update Mastodon to 3.4.5
+* [Full changelog](https://github.com/mastodon/mastodon/releases/tag/v3.4.5)
+
diff --git a/CloudronManifest.json b/CloudronManifest.json
index 3678a44..a58e85b 100644
--- a/CloudronManifest.json
+++ b/CloudronManifest.json
@@ -5,7 +5,7 @@
   "description": "file://DESCRIPTION.md",
   "changelog": "file://CHANGELOG",
   "tagline": "Federated social network",
-  "version": "1.7.3",
+  "version": "1.7.4",
   "healthCheckPath": "/about",
   "httpPort": 8000,
   "memoryLimit": 1610612736,
diff --git a/DESCRIPTION.md b/DESCRIPTION.md
index 3004d9c..22ccffb 100644
--- a/DESCRIPTION.md
+++ b/DESCRIPTION.md
@@ -1,4 +1,4 @@
-This app packages Mastodon <upstream>3.4.4</upstream>.
+This app packages Mastodon <upstream>3.4.5</upstream>.
 
 ## About
 
diff --git a/Dockerfile b/Dockerfile
index 0be3c89..3c9e784 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,7 @@ RUN gem install --no-document bundler
 ENV RAILS_ENV production
 ENV NODE_ENV production
 
-ARG VERSION=3.4.4
+ARG VERSION=3.4.5
 
 RUN curl -L https://github.com/tootsuite/mastodon/archive/v${VERSION}.tar.gz | tar -xz --strip-components 1 -f - && \
     bundle config --local set deployment 'true' && \