diff --git a/dvc/remote/http.py b/dvc/remote/http.py
index c7046f3090..c4f7285963 100644
--- a/dvc/remote/http.py
+++ b/dvc/remote/http.py
@@ -28,7 +28,7 @@ class RemoteHTTP(RemoteBase):
     scheme = "http"
     REGEX = r"^https?://.*$"
     REQUEST_TIMEOUT = 10
-    CHUNK_SIZE = 1_000_000  # Megabyte
+    CHUNK_SIZE = 1000000  # Megabyte
     PARAM_CHECKSUM = "etag"
 
     def __init__(self, project, config):
diff --git a/dvc/state.py b/dvc/state.py
index 568990a447..c166cc48ff 100644
--- a/dvc/state.py
+++ b/dvc/state.py
@@ -63,7 +63,7 @@ class State(object):  # pylint: disable=too-many-instance-attributes
         "path TEXT PRIMARY KEY, " "inode INTEGER NOT NULL, " "mtime TEXT NOT NULL"
     )
 
-    STATE_ROW_LIMIT = 100_000_000
+    STATE_ROW_LIMIT = 100000000
     STATE_ROW_CLEANUP_QUOTA = 50
 
     MAX_INT = 2 ** 63 - 1
diff --git a/pyproject.toml b/pyproject.toml
index 669ce59c38..b4f50b15ee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,5 @@
 [tool.black]
 line-length = 88
-py36 = true
 include = '\.pyi?$'
 exclude = '''
 /(