diff --git a/app/lib/kubernetes_client.py b/app/lib/kubernetes_client.py
index 5b9d449..94ea340 100644
--- a/app/lib/kubernetes_client.py
+++ b/app/lib/kubernetes_client.py
@@ -18,7 +18,7 @@ def list_validator_stateful_sets(role='authority'):
     return list(map(lambda sts: sts['metadata']['name'], validator_stateful_sets))
 
 
-def list_parachain_collator_stateful_sets(para_id):
+def list_parachain_collator_stateful_sets(para_id: str):
     stateful_sets = kubernetes_client.CustomObjectsApi().list_namespaced_custom_object(group="apps", version="v1", plural="statefulsets", namespace=namespace)
 
     collator_stateful_sets = list(
@@ -50,7 +50,7 @@ def list_validator_pods(stateful_set_name):
     return validator_pods
 
 
-def list_collator_pods(para_id=None, stateful_set_name=None):
+def list_collator_pods(para_id: str = None, stateful_set_name: str = None):
     collator_pods = list_substrate_node_pods('collator')
     if stateful_set_name:
         collator_pods = list(filter(lambda pod: pod.metadata.owner_references[0].name == stateful_set_name, collator_pods))
diff --git a/app/lib/network_utils.py b/app/lib/network_utils.py
index 3d09ba8..9e77b3e 100644
--- a/app/lib/network_utils.py
+++ b/app/lib/network_utils.py
@@ -483,7 +483,7 @@ def list_parachains():
     return parachains
 
 
-async def onboard_parachain_by_id(para_id, force_queue_action):
+async def onboard_parachain_by_id(para_id: str, force_queue_action: bool):
     log.info(f'starting to onboard parachain #{para_id}')
     relay_chain_client = get_relay_chain_client()
     sudo_seed = network_sudo_seed()
@@ -509,7 +509,7 @@ async def onboard_parachain_by_id(para_id, force_queue_action):
         log.error(f"Couldn't find parachain pod for para_id={para_id}")
 
 
-async def offboard_parachain_by_id(para_id, force_queue_action):
+async def offboard_parachain_by_id(para_id: str, force_queue_action: bool):
     log.info(f'starting to offboard parachain #{para_id}')
     substrate_client = get_relay_chain_client()
     sudo_seed = network_sudo_seed()
@@ -521,7 +521,7 @@ async def offboard_parachain_by_id(para_id, force_queue_action):
 
 
 # Collators
-def list_parachain_collators(para_id, stateful_set_name=''):
+def list_parachain_collators(para_id: str, stateful_set_name: str = ''):
     collator_pods = list_collator_pods(para_id, stateful_set_name)
     # Read the first collator pod chain metadata for this para_id to retrieve the chain name
     if collator_pods:
@@ -630,7 +630,7 @@ async def deregister_collator_nodes(chain, nodes, ss58_format):
     return accounts_to_deregister
 
 
-async def register_statefulset_collators(para_id, stateful_set_name):
+async def register_statefulset_collators(para_id: str, stateful_set_name: str):
     log.info('starting to register collators in statefulset {}'.format(stateful_set_name))
     collators_pods = list_collator_pods(para_id, stateful_set_name)
     chain = collators_pods[0].metadata.labels['chain']
@@ -639,7 +639,7 @@ async def register_statefulset_collators(para_id, stateful_set_name):
     await register_collator_nodes(chain, collator_node_names, ss58_format)
 
 
-async def deregister_statefulset_collators(para_id, stateful_set_name):
+async def deregister_statefulset_collators(para_id: str, stateful_set_name: str):
     log.info('starting to deregister collators in statefulset {}'.format(stateful_set_name))
     collators_pods = list_collator_pods(para_id, stateful_set_name)
     chain = collators_pods[0].metadata.labels['chain']