diff --git a/arkindex/process/management/commands/update_system_workers.py b/arkindex/process/management/commands/update_system_workers.py
index 50d4fca06f1f41a23df935e9d7cbd30d60f4cf7f..911350f92333dcb50e13e0faddd76292a60adc39 100644
--- a/arkindex/process/management/commands/update_system_workers.py
+++ b/arkindex/process/management/commands/update_system_workers.py
@@ -245,7 +245,7 @@ class Command(BaseCommand):
         worker_conf = next((worker for worker in data["workers"] if worker["slug"] == slug), None)
         if worker_conf is None:
             raise CommandError(f"No worker with slug {slug} in .arkindex.yml at {url}.")
-        image = f"registry.gitlab.teklia.com/{name}/{version}"
+        image = f"registry.gitlab.teklia.com/{name}:{version}"
         command = worker_conf.get("docker", {}).get("command", None)
         self.update_feature(feature, image=image, command=command, configuration=worker_conf, repo=repo)
 
diff --git a/arkindex/process/tests/commands/test_update_system_workers.py b/arkindex/process/tests/commands/test_update_system_workers.py
index a6269426296373156f5ec9ba89edaddedb964bca..351326b4cdf031700c64eea77f55ccf5d4d7fbfb 100644
--- a/arkindex/process/tests/commands/test_update_system_workers.py
+++ b/arkindex/process/tests/commands/test_update_system_workers.py
@@ -862,7 +862,7 @@ class TestUpdateSystemWorkers(ArkindexTestCase):
             f"""
             ────────────────────────────────── FileImport ──────────────────────────────────
             Configuring feature Fileimport from https://gitlab.teklia.com/repository/import/file
-            Using registry.gitlab.teklia.com/repository/import/file/0.1.0 to provide FileImport
+            Using registry.gitlab.teklia.com/repository/import/file:0.1.0 to provide FileImport
             Created new System worker type ({worker_version.worker.type_id})
             Created new FileImport system worker
             Creating new worker version
@@ -875,11 +875,11 @@ class TestUpdateSystemWorkers(ArkindexTestCase):
             "slug": "file-import",
             "type": "import_type",
         })
-        self.assertEqual(worker_version.docker_image_iid, "registry.gitlab.teklia.com/repository/import/file/0.1.0")
+        self.assertEqual(worker_version.docker_image_iid, "registry.gitlab.teklia.com/repository/import/file:0.1.0")
         self.assertEqual(worker_version.feature, ArkindexFeature.FileImport)
         self.assertEqual(worker_version.state, WorkerVersionState.Available)
         self.assertEqual(worker_version.version, 1)
-        self.assertEqual(worker_version.docker_image_iid, "registry.gitlab.teklia.com/repository/import/file/0.1.0")
+        self.assertEqual(worker_version.docker_image_iid, "registry.gitlab.teklia.com/repository/import/file:0.1.0")
         self.assertEqual(worker_version.worker.name, "FileImport")
         self.assertEqual(worker_version.worker.repository_url, "https://gitlab.teklia.com/repository/import/file")
 
@@ -888,8 +888,8 @@ class TestUpdateSystemWorkers(ArkindexTestCase):
             f"""
             ────────────────────────────────── FileImport ──────────────────────────────────
             Configuring feature Fileimport from https://gitlab.teklia.com/repository/import/file
-            Using registry.gitlab.teklia.com/repository/import/file/0.1.0 to provide FileImport
-            Current worker version: {worker_version.id} (registry.gitlab.teklia.com/repository/import/file/0.1.0)
+            Using registry.gitlab.teklia.com/repository/import/file:0.1.0 to provide FileImport
+            Current worker version: {worker_version.id} (registry.gitlab.teklia.com/repository/import/file:0.1.0)
             Worker is up to date
             Worker version for FileImport is up to date
             """
@@ -931,7 +931,7 @@ class TestUpdateSystemWorkers(ArkindexTestCase):
             f"""
             ────────────────────────────────── FileImport ──────────────────────────────────
             Configuring feature Fileimport from https://gitlab.teklia.com/repository/import/file
-            Using registry.gitlab.teklia.com/repository/import/file/0.1.0 to provide FileImport
+            Using registry.gitlab.teklia.com/repository/import/file:0.1.0 to provide FileImport
             Current worker version: {version.id} (test)
             This version has an invalid Docker image.
             This version uses a custom configuration which could interfere with the feature.
@@ -947,7 +947,7 @@ class TestUpdateSystemWorkers(ArkindexTestCase):
             "slug": "file-import",
             "type": "import_type",
         })
-        self.assertEqual(worker_version.docker_image_iid, "registry.gitlab.teklia.com/repository/import/file/0.1.0")
+        self.assertEqual(worker_version.docker_image_iid, "registry.gitlab.teklia.com/repository/import/file:0.1.0")
         self.assertEqual(worker_version.feature, ArkindexFeature.FileImport)
         self.assertEqual(worker_version.state, WorkerVersionState.Available)
         self.assertEqual(worker_version.version, 2)
@@ -972,7 +972,7 @@ class TestUpdateSystemWorkers(ArkindexTestCase):
         )
         version = file_import_worker.versions.create(
             version=1,
-            docker_image_iid="registry.gitlab.teklia.com/repository/import/file/0.1.0",
+            docker_image_iid="registry.gitlab.teklia.com/repository/import/file:0.1.0",
             state=WorkerVersionState.Available,
             feature=ArkindexFeature.FileImport,
             configuration=worker_conf,
@@ -990,13 +990,13 @@ class TestUpdateSystemWorkers(ArkindexTestCase):
             f"""
             ────────────────────────────────── FileImport ──────────────────────────────────
             Configuring feature Fileimport from https://gitlab.teklia.com/repository/import/file
-            Using registry.gitlab.teklia.com/repository/import/file/0.1.0 to provide FileImport
-            Current worker version: {version.id} (registry.gitlab.teklia.com/repository/import/file/0.1.0)
+            Using registry.gitlab.teklia.com/repository/import/file:0.1.0 to provide FileImport
+            Current worker version: {version.id} (registry.gitlab.teklia.com/repository/import/file:0.1.0)
             Worker is up to date
             Worker version for FileImport is up to date
             """
         ).strip())
-        self.assertEqual(worker_version.docker_image_iid, "registry.gitlab.teklia.com/repository/import/file/0.1.0")
+        self.assertEqual(worker_version.docker_image_iid, "registry.gitlab.teklia.com/repository/import/file:0.1.0")
         self.assertEqual(worker_version.feature, ArkindexFeature.FileImport)
         self.assertEqual(worker_version.state, WorkerVersionState.Available)
         self.assertEqual(worker_version.version, 1)