diff --git a/.isort.cfg b/.isort.cfg
deleted file mode 100644
index 816bceb8e4..0000000000
--- a/.isort.cfg
+++ /dev/null
@@ -1,5 +0,0 @@
-[settings]
-src_paths = ., tools, tools/setup/emoji
-known_third_party = zulip
-profile = black
-line_length = 100
diff --git a/pyproject.toml b/pyproject.toml
index 021cb23771..cfea661f79 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,9 @@
 [tool.black]
 line-length = 100
-target-version = ['py36']
+target-version = ["py36"]
+
+[tool.isort]
+src_paths = [".", "tools", "tools/setup/emoji"]
+known_third_party = "zulip"
+profile = "black"
+line_length = 100