diff --git a/pyproject.toml b/pyproject.toml
index d078e9a..e4b1379 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 # --- Core Metadata ---
 name = "polysolve"
-version = "0.5.0"
+version = "0.5.1"
 authors = [
   { name="Jonathan Rampersad", email="jonathan@jono-rams.work" },
 ]
diff --git a/src/polysolve/__init__.py b/src/polysolve/__init__.py
index 733090c..e1ddd05 100644
--- a/src/polysolve/__init__.py
+++ b/src/polysolve/__init__.py
@@ -713,7 +713,7 @@ if __name__ == '__main__':
 
     # --- Root Finding ---
     # 1. Analytical solution for quadratic
-    roots_analytic = quadratic_solve(f1)
+    roots_analytic = f1.quadratic_solve()
     print(f"Analytic roots of f1: {roots_analytic}") # Expected: -1, 2.5
 
     # 2. Genetic algorithm solution