diff --git a/mirrulations-client/src/mirrclient/client.py b/mirrulations-client/src/mirrclient/client.py
index d7df3d0..beb1d54 100644
--- a/mirrulations-client/src/mirrclient/client.py
+++ b/mirrulations-client/src/mirrclient/client.py
@@ -112,14 +112,14 @@ def check_status_code(response):
 
 def read_client_id(filename):
     try:
-        with open(filename, 'r') as file:
+        with open(filename, 'r', encoding='utf-8') as file:
             return int(file.readline())
     except FileNotFoundError:
         return -1
 
 
 def write_client_id(filename, client_id):
-    with open(filename, 'w') as file:
+    with open(filename, 'w', encoding='utf-8') as file:
         file.write(str(client_id))
 
 
diff --git a/mirrulations-work-generator/tests/test_results_processor.py b/mirrulations-work-generator/tests/test_results_processor.py
index 8554741..4e89378 100644
--- a/mirrulations-work-generator/tests/test_results_processor.py
+++ b/mirrulations-work-generator/tests/test_results_processor.py
@@ -12,7 +12,8 @@ def test_process_results():
     dir_path = os.path.dirname(os.path.realpath(__file__))
 
     processor = ResultsProcessor(JobQueue(database), MockDataStorage())
-    with open(f'{dir_path}/data/dockets_listing.json') as listings:
+    with open(f'{dir_path}/data/dockets_listing.json',
+              encoding='utf-8') as listings:
         data = listings.read()
         processor.process_results(json.loads(data))
 
diff --git a/mirrulations-work-server/src/mirrserver/work_server.py b/mirrulations-work-server/src/mirrserver/work_server.py
index 2c89e9f..9327f34 100644
--- a/mirrulations-work-server/src/mirrserver/work_server.py
+++ b/mirrulations-work-server/src/mirrserver/work_server.py
@@ -69,7 +69,7 @@ def write_results(directory, path, data):
         os.makedirs(f'/data/{directory}')
     except FileExistsError:
         print(f'Directory already exists in root: /data/{directory}')
-    with open(f'/data/{path}', 'w+') as file:
+    with open(f'/data/{path}', 'w+', encoding='utf-8') as file:
         file.write(json.dumps(data))