diff --git a/optlib/api.py b/optlib/api.py
index 3a46d1f..925134b 100644
--- a/optlib/api.py
+++ b/optlib/api.py
@@ -39,10 +39,7 @@ def _get(endpoint, *args, **kwargs):
     if "apikey" not in kwargs:
         kwargs.update({"apikey": _get_env("TDA_API_KEY")})
 
-    url = "?".join([endpoint, "&".join(f"{k}={v}" for k, v in kwargs.items())])
-    logger.debug("GET", url)
-
-    r = requests.get(url)
+    r = requests.get(endpoint, params=kwargs)
     r.raise_for_status()
     return r.json()
 
diff --git a/setup.py b/setup.py
index 2eb3959..808a7f4 100644
--- a/setup.py
+++ b/setup.py
@@ -2,11 +2,11 @@ from setuptools import setup
 
 setup(
     name="optlib",
-    version="0.5.0",
+    version="0.5.1",
     description="A library for financial options pricing written in Python.",
     url="http://github.com/bartolomed/optlib",
     author="Davis Edwards & Daniel Rojas",
     packages=["optlib"],
-    install_requires=["numpy", "scipy", "pandas"],
+    install_requires=["numpy", "scipy", "pandas", "requests"],
     zip_safe=False
 )