diff --git a/.gitignore b/.gitignore
index 9e859ce..cdd306e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,5 +14,6 @@ src/tidy_tweet/_version.py
 .eggs
 *.egg-info
 dist/*
+build/*
 .nox/*
 *.pytest_cache/*
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..6180328
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+click==8.0.3
diff --git a/setup.cfg b/setup.cfg
index 389305e..e9ed0e1 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -21,6 +21,8 @@ package_dir =
     = src
 packages = find:
 python_requires = >=3.8
+install_requires =
+    click >= 8.0.3
 include_package_data = True
 
 [options.packages.find]