diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8b34e6b..8c33bef 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,7 +31,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: actions/setup-go@v7
         with:
-          go-version: '1.27.2'
+          go-version: '1.27.3'
       - run: go version
       # Not on Windows: its checkout converts line endings to CRLF.
       - name: gofmt
@@ -60,7 +60,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: actions/setup-go@v7
         with:
-          go-version: '1.27.2'
+          go-version: '1.27.3'
       - name: govulncheck
         run: go run golang.org/x/vuln/cmd/govulncheck@v1.8.0 ./...
       - name: Fuzz the binding arguments for 60 s
@@ -73,7 +73,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: actions/setup-go@v7
         with:
-          go-version: '1.27.2'
+          go-version: '1.27.3'
       - run: go vet ./... && go test ./... && go test -tags rbgo_core ./...
 
   arch-qemu:
@@ -91,7 +91,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: actions/setup-go@v7
         with:
-          go-version: '1.27.2'
+          go-version: '1.27.3'
       - run: sudo apt-get update && sudo apt-get install -y qemu-user-static
       - name: Vet + test under qemu (${{ matrix.goarch }})
         run: |
@@ -105,7 +105,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: actions/setup-go@v7
         with:
-          go-version: '1.27.2'
+          go-version: '1.27.3'
       - name: go test -c for each target, both builds
         shell: bash
         run: |
diff --git a/README.md b/README.md
index 42eb084..226c771 100644
--- a/README.md
+++ b/README.md
@@ -419,17 +419,36 @@ parameters as readers.
 
 `a` `cdf` `entropy` `inspect` `interval` `isf` `kurtosis` `loc` `logcdf` `logpmf` `logsf` `mean` `median` `moment` `pmf` `ppf` `rvs` `sf` `skew` `std` `support` `to_h` `validate` `var` `new`
 
-
---- PASS: TestPrintBindings (0.02s)
-PASS
-ok  	github.com/go-scikit/ruby	1.227s
 ## Notebooks
 
-Package [cells](cells/) runs the Ruby cells of a
-[go-notebook](https://github.com/go-notebook/notebook) notebook: one
-interpreter per worker, whose top-level locals persist from cell to cell, and
-the exchange of variables with the Go cells. Its documentation states the
-conversion rules both ways; a notebook links it, you do not call it.
+These bindings are what a ` ```ruby ` cell of a
+[go-notebook](https://github.com/go-notebook/notebook) notebook (v0.3.0 and
+later) runs on. A notebook can mix Go and Ruby cells, and their variables
+cross both ways:
+
+````markdown
+```go
+xs := []float64{2.1, 3.4, 1.9, 5.6, 4.4, 3.3, 2.8, 4.9}
+```
+
+```ruby
+fit = Stats::Normal.fit(xs)   # xs is a Ruby Array of Floats here
+loc, scale = fit.loc, fit.scale
+```
+
+```go
+import "fmt"
+
+fmt.Printf("loc %.3f, scale %.3f\n", loc, scale) // float64s here
+```
+````
+
+Package [cells](cells/) runs those cells: one interpreter per worker, whose
+top-level locals persist from cell to cell, and the exchange of variables with
+the Go cells. Its documentation states the conversion rules both ways; a
+notebook links it, you do not call it. The notebook's kernel requires this
+module in its work module by itself, so a notebook's own `go.mod` only needs
+go-notebook.
 
 ## Build tags