Explicitely require requests

setup.py

@@ -34,7 +34,7 @@ setup(
     author="Felix Schäfer",
     author_email="admin@kif.rocks",
     license="MIT License",
-    install_requires=[],
+    install_requires=["requests"],
     packages=find_packages(exclude=["tests", "tests.*"]),
     include_package_data=True,
     cmdclass=cmdclass,