diff --git a/rq/job.py b/rq/job.py
index a0574e60..ee8544ad 100644
--- a/rq/job.py
+++ b/rq/job.py
@@ -716,7 +716,7 @@ class Job:
 
     @property
     def dependencies_key(self):
-        return '{0}:{1}:dependencies'.format(self.redis_job_namespace_prefix, self.id)
+        return '{0}{1}:dependencies'.format(self.redis_job_namespace_prefix, self.id)
 
     def fetch_dependencies(self, watch: bool = False, pipeline: Optional['Pipeline'] = None) -> List['Job']:
         """Fetch all of a job's dependencies. If a pipeline is supplied, and
diff --git a/tests/test_job.py b/tests/test_job.py
index 23bbd119..850bf7c4 100644
--- a/tests/test_job.py
+++ b/tests/test_job.py
@@ -994,7 +994,7 @@ class TestJob(RQTestCase):
     def test_dependencies_key_should_have_prefixed_job_id(self):
         job_id = 'random'
         job = Job(id=job_id)
-        expected_key = Job.redis_job_namespace_prefix + ":" + job_id + ':dependencies'
+        expected_key = Job.redis_job_namespace_prefix + job_id + ':dependencies'
 
         assert job.dependencies_key == expected_key