diff --git a/acceptance/python/src/test_naughty_strings.py b/acceptance/python/src/test_naughty_strings.py
index 61776048..35746bc9 100644
--- a/acceptance/python/src/test_naughty_strings.py
+++ b/acceptance/python/src/test_naughty_strings.py
@@ -66,8 +66,11 @@ def send_naughty_tx(asset, metadata):
         # Then she expects a nicely formatted error code
         status_code = sent_transaction.status_code
         error = sent_transaction.error
-        regex = '\{"message":"Invalid transaction \\(ValidationError\\): Invalid key name .* in asset object. ' \
-                'The key name cannot contain characters .* or null characters","status":400\}\n'
+        regex = (
+            r'\{\s*\n*'
+            r'\s*"message": "Invalid transaction \(ValidationError\): Invalid key name.*The key name cannot contain characters.*\n*' # noqa
+            r'\s*"status": 400\n*'
+            r'\s*\}\n*')
         assert status_code == 400
         assert re.fullmatch(regex, error), sent_transaction
     # Otherwise, she expects to see her transaction in the database
diff --git a/setup.py b/setup.py
index c99c0740..27c5f091 100644
--- a/setup.py
+++ b/setup.py
@@ -77,15 +77,15 @@ install_requires = [
     'cryptoconditions==0.8.0',
     'python-rapidjson~=0.6.0',
     'logstats~=0.2.1',
-    'flask>=0.10.1',
+    'flask~=0.12.4',
     'flask-cors~=3.0.0',
     'flask-restful~=0.3.0',
-    'requests>=2.20.0',
+    'requests~=2.20.0',
     'gunicorn~=19.0',
     'jsonschema~=2.5.1',
     'pyyaml>=4.2b1',
     'aiohttp~=3.0',
-    'bigchaindb-abci==1.0.1',
+    'bigchaindb-abci>=1.0.2',
     'setproctitle~=1.1.0',
     'packaging~=18.0',
 ]