diff --git a/docker-compose.yaml b/docker-compose.yaml
index 17dd797a64431976c052e4032f88d7fc500cf665..714c20dd4e02c9f86bc5a15520fc137e72512d8c 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -1,5 +1,4 @@
 version: '2'
-services:
 services:
   mariadb-dtt:
     container_name: moodledb-dtt
@@ -13,9 +12,10 @@ services:
       - MARIADB_COLLATE=utf8mb4_unicode_ci
     volumes:
       - 'mariadb_data_dtt:/bitnami/mariadb'
+
   moodle-dtt:
     container_name: moodle-dtt
-    image: docker.io/bitnami/moodle:4.3
+    image: docker.io/bitnami/moodle:4.4
     ports:
       - '81:8080'
       - '444:8443'
@@ -31,16 +31,18 @@ services:
       - 'moodledata_data_dtt:/bitnami/moodledata'
     depends_on:
       - mariadb-dtt
+
   backend:
-    container_name: backendcomposedtt
-    image: hftstuttgart/dta-backend:latest
+    container_name: cota-backend
+    image: cota-backend:flexmounts
     user: "${UID}:${GID}"
     environment:
       - HOST_TEST_DIR=/tmp/cota-tests
       - CONTAINER_TEST_DIR=/tmp/cota-tests
     volumes: 
       - /var/run/docker.sock:/var/run/docker.sock
-      - '${HOST_TEST_DIR}:${CONTAINER_TEST_DIR}'
+      - "${HOST_TEST_DIR}:${CONTAINER_TEST_DIR}"
+
 volumes:
   mariadb_data_dtt:
     driver: local
diff --git a/student-dir.txt b/student-dir.txt
index 782b69e79af92e1e4eb923cb6ab7573bad02f78f..50f42b17fa8843ac424912a4f87c1fd0359107ca 100644
--- a/student-dir.txt
+++ b/student-dir.txt
@@ -1 +1 @@
-dta::https://transfer.hft-stuttgart.de/gitlab/dtt/example_openjdk11-junit5-calculator-submission.git::none::none::/
+dta::https://transfer.hft-stuttgart.de/gitlab/cota/examples/cota-submission-calc-jdk.git::none::none::/
diff --git a/teacher-dta-dir-test-runner-jdk21.txt b/teacher-dta-dir-test-runner-jdk21.txt
index c04b7cc9cb022c37f28bb08bdbc2af4b67e3ae4a..1f8745383614ad1b58d835cdb242f74ff21182d2 100644
--- a/teacher-dta-dir-test-runner-jdk21.txt
+++ b/teacher-dta-dir-test-runner-jdk21.txt
@@ -1 +1 @@
-dta::https://transfer.hft-stuttgart.de/gitlab/dtt/example_openjdk11-junit5-calculator-test.git::none::none::/::dta-jdk21-junit5-testrunner:nov05
+dta::https://transfer.hft-stuttgart.de/gitlab/cota/examples/cota-test-course-jdk.git::none::none::/topic02/exercise04::cota-jdk21-junit5-testrunner:latest