diff --git a/pyproject.toml b/pyproject.toml
index f1f9eac..cccffac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,5 +14,6 @@ requires-python = ">=3.7"
 dependencies = [
     "noise",
     "numpy",
-    "pillow"
+    "pillow",
+    "matplotlib"
 ]