diff --git a/Makefile b/Makefile
index 5f18ab7..5d7c7bc 100644
--- a/Makefile
+++ b/Makefile
@@ -11,9 +11,9 @@
 # 4. Set VESION_DEVEL to 0, commit to main.
 # 5. Tag the release: `git tag -a vN.N.N -m "libcyaml N.N.N"`
 # 6. Set VESION_DEVEL to 1, commit to main.
-VERSION_MAJOR = 1
-VERSION_MINOR = 4
-VERSION_PATCH = 1
+VERSION_MAJOR = 2
+VERSION_MINOR = 0
+VERSION_PATCH = 0
 VERSION_DEVEL = 1
 VERSION_STR = $(VERSION_MAJOR).$(VERSION_MINOR).$(VERSION_PATCH)
 
diff --git a/README.md b/README.md
index db8e228..45bc3a5 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,12 @@ LibCYAML: Schema-based YAML parsing and serialisation
 LibCYAML is a C library for reading and writing structured YAML documents.
 It is written in ISO C11 and licensed under the ISC licence.
 
+> **Warning**
+>
+> The `main` branch is currently undergoing changes for version 2.
+> You probably want to be using a
+> [tagged release](https://github.com/tlsa/libcyaml/tags) instead.
+
 Overview
 --------