diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0215cfc..0ee718f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -289,6 +289,33 @@ jobs:
             ./dev_scripts/env.py --distro fedora --version 37 run --dev \
                 bash -c 'cd dangerzone; poetry run make test'
 
+  ci-debian-trixie:
+    machine:
+      image: ubuntu-2004:202111-01
+    steps:
+      - checkout
+      - run: *install-podman
+
+      - run:
+          name: Prepare cache directory
+          command: |
+            sudo mkdir -p /caches
+            sudo chown -R $USER:$USER /caches
+      - run: *calculate-cache-key
+      - restore_cache: *restore-cache
+      - run: *copy-image
+
+      - run:
+          name: Prepare Dangerzone environment
+          command: |
+            ./dev_scripts/env.py --distro debian --version trixie build-dev
+
+      - run:
+          name: Run CI tests
+          command: |
+            ./dev_scripts/env.py --distro debian --version trixie run --dev \
+                bash -c 'cd dangerzone; poetry run make test'
+
   ci-debian-bookworm:
     machine:
       image: ubuntu-2004:202111-01
@@ -413,6 +440,18 @@ jobs:
       - run: *copy-image
       - run: *build-deb
 
+  build-debian-trixie:
+    docker:
+      - image: debian:trixie
+    resource_class: medium+
+    steps:
+      - run: *install-dependencies-deb
+      - checkout
+      - run: *calculate-cache-key
+      - restore_cache: *restore-cache
+      - run: *copy-image
+      - run: *build-deb
+
   build-debian-bookworm:
     docker:
       - image: debian:bookworm
@@ -480,6 +519,9 @@ workflows:
       - ci-ubuntu-focal:
           requires:
             - build-container-image
+      - ci-debian-trixie:
+          requires:
+            - build-container-image
       - ci-debian-bookworm:
           requires:
             - build-container-image
@@ -504,6 +546,9 @@ workflows:
       - build-debian-bullseye:
           requires:
             - build-container-image
+      - build-debian-trixie:
+          requires:
+            - build-container-image
       - build-debian-bookworm:
           requires:
             - build-container-image
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 40b8fb7..eac5090 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -98,6 +98,9 @@ jobs:
           - target: debian-bookworm
             distro: debian
             version: bookworm
+          - target: debian-trixie
+            distro: debian
+            version: trixie
 
     steps:
       - name: Checkout
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5918c50..7730d44 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ since 0.4.1, and this project adheres to [Semantic Versioning](https://semver.or
 ### Added
 
 - Platform support: Alpha integration with Qubes OS ([issue #411](https://github.com/freedomofpress/dangerzone/issues/411))
+- Platform support: Debian Trixie (13)
 
 ### Removed
 
diff --git a/dev_scripts/qa.py b/dev_scripts/qa.py
index 4e90a3d..a7523f1 100755
--- a/dev_scripts/qa.py
+++ b/dev_scripts/qa.py
@@ -778,6 +778,11 @@ class QADebianBookworm(QADebianBased):
     VERSION = "bookworm"
 
 
+class QADebianTrixie(QADebianBased):
+    DISTRO = "debian"
+    VERSION = "trixie"
+
+
 class QAUbuntu2004(QADebianBased):
     DISTRO = "ubuntu"
     VERSION = "20.04"