diff --git a/pulsar/client/transport/tus.py b/pulsar/client/transport/tus.py
index fc60939d..209cf64d 100644
--- a/pulsar/client/transport/tus.py
+++ b/pulsar/client/transport/tus.py
@@ -10,7 +10,6 @@
     tus_client_available = True
 except ImportError:
     tus_client_available = False
-    client = None
 
 TUS_CLIENT_UNAVAILABLE_MESSAGE = \
     "You are attempting to use the Tus transport with the Pulsar client but tuspy is unavailable."
@@ -39,7 +38,6 @@ def tus_upload_file(url: str, path: str) -> None:
     post_response.raise_for_status()
 
 
-
 def find_tus_endpoint(job_files_endpoint: str) -> str:
     parsed = urlparse(job_files_endpoint)
     job_files_url_path = parsed.path
diff --git a/requirements.txt b/requirements.txt
index de27a41c..1db30fa4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,6 +10,7 @@ paramiko
 typing-extensions
 pydantic-tes>=0.1.5
 pyjwt
+tuspy
 
 ## Uncomment if using DRMAA queue manager.
 #drmaa