diff --git a/README.md b/README.md
index 1af9128..a663ae0 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ See [Core Networks API Documentation](https://beta.api.core-networks.de/doc/) fo
 ```bash
 git clone https://git.hogertz.eu/hendrik-hog/certbot-dns-corenetworks.git
 cd certbot-dns-corenetworks
-pip install .
+pip3 install .
 ```
 
 ## Named Arguments
diff --git a/pyproject.toml b/pyproject.toml
index 2368e46..2b9727e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ classifiers = [
     "Development Status :: 4 - Beta",
     "Environment :: Plugins",
     "Intended Audience :: System Administrators",
-    "License :: OSI Approved :: Apache Software License",
+    "License :: OSI Approved :: Apache-2.0",
     "Operating System :: POSIX :: Linux",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",