diff --git a/README.md b/README.md
index 6502650..61c8b74 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,10 @@
 
 Make requests to NetSuite SuiteTalk SOAP/REST Web Services and Restlets
 
+## Beta quality disclaimer
+
+The project's API is still very much in fluctuation. Please consider pinning your dependency to this package to a minor version (e.g. `poetry add netsuite~0.6` or `pipenv install netsuite~=0.6.0`), which is guaranteed to have no breaking changes. From 1.0 and forward we will keep a stable API.
+
 ## Installation
 
 Programmatic use only:
diff --git a/pyproject.toml b/pyproject.toml
index f298213..b6f3e73 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ homepage = "https://jmagnusson.github.io/netsuite/"
 repository = "https://github.com/jmagnusson/netsuite"
 documentation = "https://jmagnusson.github.io/netsuite/"
 classifiers = [
-    "Development Status :: 3 - Alpha",
+    "Development Status :: 4 - Beta",
     "Environment :: Web Environment",
     "Intended Audience :: Developers",
     "License :: OSI Approved :: MIT License",