diff --git a/pyproject.toml b/pyproject.toml
index 85823bd..6da29bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,6 +10,7 @@ python = "^3.7"
 pandas = "^1.0.3"
 requests = "^2.23.0"
 numpy = "^1.18.2"
+matplotlib = "^3.2.1"
 
 [tool.poetry.dev-dependencies]
 sphinx = "^2.4.4"
@@ -17,6 +18,7 @@ sphinxcontrib-napoleon = "^0.7"
 flake8 = "^3.7.9"
 pytest = "^5.4.1"
 pytest-cov = "^2.8.1"
+python-semantic-release = "^5.0.2"
 
 [build-system]
 requires = ["poetry>=0.12"]