diff --git a/.github/workflows/test-long-all.yml b/.github/workflows/test-long-all.yml
index 9dac7c4..020c088 100644
--- a/.github/workflows/test-long-all.yml
+++ b/.github/workflows/test-long-all.yml
@@ -17,7 +17,7 @@
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
         version: ['stable', 'insiders']
-        go: ['1.20', '1.21', '1.22', '1.23']
+        go: ['1.21', '1.22', '1.23']
 
     steps:
       - name: Clone repository
diff --git a/.github/workflows/test-long.yml b/.github/workflows/test-long.yml
index 1f0af71..eb1e201 100644
--- a/.github/workflows/test-long.yml
+++ b/.github/workflows/test-long.yml
@@ -16,7 +16,7 @@
       matrix:
         os: [ubuntu-latest, windows-latest] # TODO: reenable macos-latest
         version: ['stable']
-        go: ['1.20', '1.21', '1.22', '1.23']
+        go: ['1.21', '1.22', '1.23']
 
     steps:
       - name: Clone repository
diff --git a/README.md b/README.md
index 6afca91..f78618b 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@
 ## Requirements
 
 * Visual Studio Code 1.75 or newer (or editors compatible with VS Code 1.75+ APIs)
-* Go 1.19 or newer.
+* Go 1.21 or newer.
 
 ## Quick Start
 
@@ -19,7 +19,7 @@
 Whether you are new to Go or an experienced Go developer, we hope this
 extension fits your needs and enhances your development experience.
 
-1.  Install [Go](https://go.dev) 1.19 or newer if you haven't already.
+1.  Install [Go](https://go.dev) 1.21 or newer if you haven't already.
 
 1.  Install the [VS Code Go extension].
 
@@ -182,6 +182,30 @@
 Go telemetry is designed to be transparent and privacy-preserving. Learn more at
 [https://go.dev/doc/telemetry](https://go.dev/doc/telemetry).
 
+## Support Policy
+
+The Go extension is maintained by engineers on the
+[Go tools team](https://github.com/orgs/golang/teams/tools-team/members),
+who actively monitor the [VS Code Go](https://github.com/golang/vscode-go/issues)
+and the [Go](https://github.com/golang/go/issues?q=is%3Aissue+is%3Aopen+label%3Agopls)
+issue trackers.
+
+We support only the latest stable and pre-release versions of the extension.
+
+### Supported Go and tools
+
+The Go extension follows the [Go Release Policy](https://go.dev/doc/devel/release.html#policy),
+meaning that it _officially_ supports the two most recent major Go releases.
+The Go team maintains _best-effort_ support for the last three major Go versions.
+
+The Go extension relies on [tools](https://github.com/golang/vscode-go/wiki/tools)
+like `gopls` and `dlv` for its core functionalities and they have their own release
+policy and schedule. We test only against the latest versions of these tools.
+
+In case you need to work with an older version of Go, please check
+the [Compatibility] page and manually install the compatible version of
+the extension and tools.
+
 ## Contributing
 
 We welcome your contributions and thank you for working to improve the Go
@@ -211,6 +235,7 @@
 [IntelliSense]: https://github.com/golang/vscode-go/wiki/features#intellisense
 [Code navigation]: https://github.com/golang/vscode-go/wiki/features#code-navigation
 [Code editing]: https://github.com/golang/vscode-go/wiki/features#code-editing
+[Compatibility]: https://github.com/golang/vscode-go/wiki/compatibility
 [diagnostics]: https://github.com/golang/vscode-go/wiki/features#diagnostics
 [testing]: https://github.com/golang/vscode-go/wiki/features#run-and-test-in-the-editor
 [debugging]: https://github.com/golang/vscode-go/wiki/debugging#features
@@ -218,4 +243,4 @@
 [workspace documentation]: https://github.com/golang/tools/blob/master/gopls/doc/workspace.md
 [`Go: Install/Update Tools` command]: https://github.com/golang/vscode-go/wiki/commands#go-installupdate-tools
 [Supported workspace layouts documentation]: https://github.com/golang/tools/blob/master/gopls/doc/workspace.md
-[Workspace Folders]: https://code.visualstudio.com/docs/editor/multi-root-workspaces
+[Workspace Folders]: https://code.visualstudio.com/docs/editor/multi-root-workspaces
\ No newline at end of file
diff --git a/docs/compatibility.md b/docs/compatibility.md
new file mode 100644
index 0000000..015d4d3
--- /dev/null
+++ b/docs/compatibility.md
@@ -0,0 +1,18 @@
+
+## Version Compatibility
+
+The table below lists the *last* version of the extension
+known to be compatible with old versions of Go, and the last versionof tools
+compatible with it.
+
+| Go version | Extension version | VS Code | Gopls     | Delve        |
+| ---------- | ----------------- | ------- | --------- | ------------ |
+| go1.20     | v0.42.1           | 1.75+   | v0.15.3   | v1.22.1      |
+| go1.19     | v0.42.1           | 1.75+   | v0.15.3   | v1.21.2      |
+| go1.18     | v0.41.3           | 1.75+   | v0.14.2   | v1.20.0      |
+| go1.17     | v0.39.1           | 1.67+   | v0.11.0   | v1.9.1       |
+| go1.16     | v0.39.1           | 1.67+   | v0.11.0   | v1.8.3       |
+
+### References
+  * Gopls's [supported go versions](https://github.com/golang/tools/tree/master/gopls#supported-go-versions).
+  * Delve's [supported go versions](https://github.com/go-delve/delve/blob/master/pkg/goversion/compat.go).
\ No newline at end of file
diff --git a/extension/tools/installtools/main.go b/extension/tools/installtools/main.go
index b9aecc9..85d2f4b 100644
--- a/extension/tools/installtools/main.go
+++ b/extension/tools/installtools/main.go
@@ -38,8 +38,8 @@
 	{"golang.org/x/tools/gopls", "", true, nil},
 	{"github.com/cweill/gotests/gotests", "", false, nil},
 	{"github.com/haya14busa/goplay/cmd/goplay", "", false, nil},
-	{"honnef.co/go/tools/cmd/staticcheck", "", false, []finalVersion{{18, "v0.3.3"}, {20, "v0.4.7"}}},
-	{"github.com/go-delve/delve/cmd/dlv", "", false, []finalVersion{{16, "v1.8.3"}, {17, "v1.9.1"}, {18, "v1.20.2"}, {20, "v1.22.1"}}},
+	{"honnef.co/go/tools/cmd/staticcheck", "", false, []finalVersion{{21, "v0.4.7"}}},
+	{"github.com/go-delve/delve/cmd/dlv", "", false, nil},
 }
 
 // pickVersion returns the version to install based on the supported
@@ -58,7 +58,7 @@
 	if err != nil {
 		exitf("failed to find go version: %v", err)
 	}
-	if ver < 1 {
+	if ver < 21 {
 		exitf("unsupported go version: 1.%v", ver)
 	}