diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..b29d003
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,4 @@
+[tool.isort]
+src_paths = ["tools", "zulip", "zulip_bots", "zulip_botserver"]
+profile = "black"
+line_length = 100
diff --git a/requirements.txt b/requirements.txt
index 7d0095a..055dca1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,7 @@
 crayons
 twine
 coverage>=4.4.1
+isort
 flake8
 mock
 pytest