diff --git a/docs/source/index.rst b/docs/source/index.rst
index c5e8792..fe4a381 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -29,7 +29,7 @@ Create virtual environment, activate, install
     source venv/bin/activate
     pip3 install cryptocom-exchange
 
-Userful examples
+Useful examples
 ================
 
 - To use pairs from server and have fresh data instead of constants from `pairs` use `sync_pairs`
diff --git a/poetry.lock b/poetry.lock
index c0babd2..2e3237a 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -559,7 +559,7 @@ idna2008 = ["idna"]
 name = "setuptools"
 version = "65.5.0"
 description = "Easily download, build, install, upgrade, and uninstall Python packages"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.7"
 
@@ -788,7 +788,7 @@ testing = ["flake8 (<5)", "func-timeout", "jaraco.functools", "jaraco.itertools"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "663719bfba8e553a89fb452aac5538b88ea6e8f08eb4925371a3db733e133dad"
+content-hash = "57b9c1b4e8e78028ae22eb2eb9d094f44b6edd494ec16e47358f7d06f2cc5b6b"
 
 [metadata.files]
 aiolimiter = [
diff --git a/pyproject.toml b/pyproject.toml
index 84289f5..59ee47c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,6 +21,7 @@ cached-property = "^1.5.2"
 httpx = "^0.23.0"
 python = "^3.7"
 websockets = "^10.3"
+setuptools = "^65.5.0"
 
 [tool.poetry.dev-dependencies]
 flake8 = "3.9"