diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f7c0ea8..ea960db 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
-      - uses: actions/cache@v1
+      - uses: julia-actions/cache@v1
         env:
           cache-name: cache-artifacts
         with:
diff --git a/Project.toml b/Project.toml
index 87a39e9..6c7155a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "LearnTestAPI"
 uuid = "3111ed91-c4f2-40e7-bb19-7f6c618409b8"
 authors = ["Anthony D. Blaom <anthony.blaom@gmail.com>"]
-version = "0.2.2"
+version = "0.2.3"
 
 [deps]
 CategoricalArrays = "324d7699-5711-5eae-9e2f-1d82baa6b597"
diff --git a/README.md b/README.md
index 7b9f893..ee1bacd 100644
--- a/README.md
+++ b/README.md
@@ -8,4 +8,7 @@ machine learning and statistics
 [![Build Status](https://github.com/JuliaAI/LearnTestAPI.jl/workflows/CI/badge.svg)](https://github.com/JuliaAI/LearnTestAPI.jl/actions)
 [![codecov](https://codecov.io/gh/JuliaAI/LearnTestAPI.jl/graph/badge.svg?token=gCIQfDtzMt)](https://codecov.io/gh/JuliaAI/LearnTestAPI.jl)
  
-See [LearnAPI.jl](https://juliaai.github.io/LearnAPI.jl/stable/) for documentation. 
+This repo also provides some built-in learner implementations, for testing
+meta-algorithms, and to serve as exemplars.
+
+Documentation is [here](https://juliaai.github.io/LearnAPI.jl/stable/testing_an_implementation/) (embedded in the [LearnAPI.jl](https://juliaai.github.io/LearnAPI.jl/stable/) documentation).
diff --git a/src/learners/incremental_algorithms.jl b/src/learners/incremental_algorithms.jl
index 202f1cc..8b2a3ee 100644
--- a/src/learners/incremental_algorithms.jl
+++ b/src/learners/incremental_algorithms.jl
@@ -29,7 +29,7 @@ additional observations post facto: The following is equivalent to `d2 =
 predict(NormalEstimator(), vcat(y, ynew))`:
 
 ```julia
-update_observations(model, ynew)
+model = update_observations(model, ynew)
 d2 = predict(model)
 ```