diff --git a/CHANGELOG.md b/CHANGELOG.md
index cd7e44d..f4252a3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,16 @@
 # Changelog
 
+## 2026-11-06 — SDK 0.3.1 migration
+
+- Updated the workspace to `xfetch-plugin-api` 0.3.1 and
+  `xfetch-guest-api` 0.3.1.
+- SDK dependencies now resolve from crates.io; the temporary git branch is no
+  longer required.
+- The JSON protocol remains version 1 and the WIT remains
+  `xfetch:runtime@0.1.0`.
+- 0.3.1 removes an unused direct `serde` dependency from
+  `xfetch-guest-api`; plugin code is unchanged.
+
 ## 2026-11-06 — Banner width fix
 
 - `banner` 0.2.1: centre the proverb against the visible logo width using
diff --git a/Cargo.lock b/Cargo.lock
index f08d2d0..a8cc682 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -445,9 +445,9 @@ dependencies = [
 
 [[package]]
 name = "xfetch-api-common"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d7a35b6c4f442aea26e73bb821978a637bd31261d80d4e97c11185876dd684c"
+checksum = "d67a2db2341dd5b8d6ae933c35dcd75670b4379e206ac59ffc1f42c94021315d"
 dependencies = [
  "serde",
  "serde_json",
@@ -455,12 +455,11 @@ dependencies = [
 
 [[package]]
 name = "xfetch-guest-api"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a48b8ca8b0a8f1218f09dbd93570cef036cd9bd19f9b3763e25b912ad1805ab3"
+checksum = "e9dcc7f00258477ae741b350cc6252f40969317f8f6e119bd83dfc0562dd72c8"
 dependencies = [
  "base64",
- "serde",
  "serde_json",
 ]
 
@@ -475,9 +474,9 @@ dependencies = [
 
 [[package]]
 name = "xfetch-plugin-api"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0455e40808edcf2da4ced9c032eaee0c89b130ab76aa214257b8d90d1a5f5df5"
+checksum = "79be6250101bee33db48a366b52d00284aa63f78017931f9237bf239a632dd14"
 dependencies = [
  "serde",
  "serde_json",
diff --git a/Cargo.toml b/Cargo.toml
index 2490def..32a20a5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,5 +21,5 @@ members = [
 resolver = "2"
 
 [workspace.dependencies]
-xfetch-plugin-api = { version = "0.3.0", package = "xfetch-plugin-api" }
-xfetch-guest-api = { version = "0.3.0", package = "xfetch-guest-api" }
+xfetch-plugin-api = { version = "0.3.1", package = "xfetch-plugin-api" }
+xfetch-guest-api = { version = "0.3.1", package = "xfetch-guest-api" }
diff --git a/docs/compatibility.md b/docs/compatibility.md
index 1faece7..e7656aa 100644
--- a/docs/compatibility.md
+++ b/docs/compatibility.md
@@ -3,11 +3,12 @@
 <h2>SDK compatibility</h2>
 
 <p>
-  The plugins in this repository target <code>xfetch-plugin-api 0.3.0</code>
-  and <code>xfetch-guest-api 0.3.0</code>. The JSON protocol remains
+  The plugins in this repository target <code>xfetch-plugin-api 0.3.1</code>
+  and <code>xfetch-guest-api 0.3.1</code>. The JSON protocol remains
   <code>1</code> and the WIT package remains
   <code>xfetch:runtime@0.1.0</code>. Plugins built against the previous
-  <code>0.2.0</code> SDK remain runtime-compatible.
+  <code>0.2.0</code> SDK remain runtime-compatible. SDK dependencies resolve
+  from crates.io; no git branch is required.
 </p>
 
 <p>