diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index c59d431c..d0011fb8 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -21,7 +21,7 @@ jobs:
         with:
           # Minimum supported build toolchain is Go 1.25.12 (go.mod floor);
           # "1.25" resolves to the latest 1.25.x patch release.
-          go-version: "1.25"
+          go-version: "1.27"
 
       - name: build
         env:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5bc50b72..ee8835e0 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,7 +19,7 @@ jobs:
         with:
           # Minimum supported build toolchain is Go 1.25.12 (go.mod floor);
           # "1.25" resolves to the latest 1.25.x patch release.
-          go-version: "1.25"
+          go-version: "1.27"
 
       - name: build
         run: go build -o /tmp/odek-test github.com/BackendStack21/odek/cmd/odek && chmod +x /tmp/odek-test
@@ -40,12 +40,12 @@ jobs:
 
       - uses: actions/setup-go@v5
         with:
-          go-version: "1.25"
+          go-version: "1.27"
 
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v7
         with:
-          version: v2.12.2
+          version: v2.14.0
           args: --timeout=10m
 
   ui-js:
diff --git a/go.mod b/go.mod
index 068fd7bd..9df6bd88 100644
--- a/go.mod
+++ b/go.mod
@@ -1,16 +1,13 @@
 module github.com/BackendStack21/odek
 
-go 1.25.0
+go 1.27.0
 
 require (
+	github.com/BackendStack21/go-llm-sdk v0.6.0
 	github.com/BackendStack21/go-mcp v1.3.0
 	github.com/BackendStack21/go-vector v1.4.0
-	golang.org/x/net v0.58.0
-	golang.org/x/term v0.45.0
+	golang.org/x/image v0.46.0
+	golang.org/x/net v0.59.0
+	golang.org/x/sys v0.48.0
+	golang.org/x/term v0.46.0
 )
-
-require golang.org/x/sys v0.47.0
-
-require github.com/BackendStack21/go-llm-sdk v0.6.0
-
-require golang.org/x/image v0.45.0
diff --git a/go.sum b/go.sum
index 7dfe8582..0e104800 100644
--- a/go.sum
+++ b/go.sum
@@ -4,11 +4,11 @@ github.com/BackendStack21/go-mcp v1.3.0 h1:55iJgiAgcptv+mQwWEHNaFqPJksPR6zn4beYj
 github.com/BackendStack21/go-mcp v1.3.0/go.mod h1:RKFw6nrl6ySQqqrR8KtG7HYZ/heyyjT8SjiEtlbTMY8=
 github.com/BackendStack21/go-vector v1.4.0 h1:Ssu5RDEt4Cr9A17/ogdfjeuaLFFNHASJBIEGpqKzAV0=
 github.com/BackendStack21/go-vector v1.4.0/go.mod h1:TkxZEqKGeN38QNWUoQt4xJcf6n2kI1pY7nu6ibXK1Yo=
-golang.org/x/image v0.45.0 h1:FMb1nTbH5H9vF55SriQHgFw5GnNL9Jg6L25BwXKzhB0=
-golang.org/x/image v0.45.0/go.mod h1:n62x/7RqlwXDvGsSU4u6IUTUf6KghUZ9Bt7cG/T9Fx4=
-golang.org/x/net v0.58.0 h1:ynWG7rqYi4ccpTEuPZ2QGWHktVEM9DMCj9yzDE0Q7To=
-golang.org/x/net v0.58.0/go.mod h1:YwCddHnFlT7eLQqVprV19OnhLGtc5xOKgE0RyqgfWAU=
-golang.org/x/sys v0.47.0 h1:o7XGOvZQCADBQQ4Y7VNq2dRWQR7JmOUW8Kxx4ZsNgWs=
-golang.org/x/sys v0.47.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
-golang.org/x/term v0.45.0 h1:NwWyBmoJCbfTHpxrWoZ9C6/VxOf7ic219I8xZZFdrf0=
-golang.org/x/term v0.45.0/go.mod h1:9aqxs0blBcrm/n0L9QW0aRVD+ktan8ssZromtqJC43w=
+golang.org/x/image v0.46.0 h1:b1+oYj0Jbp6K5MDT4i4/eZpYlk3V8SJhhDKh6LBHAyQ=
+golang.org/x/image v0.46.0/go.mod h1:3B3W05VGVQyuXucLINLjXKrqISASfi4Xj+iCVkLMwew=
+golang.org/x/net v0.59.0 h1:5zfYln+w5XCxwrnMMJPufRgNoXEaGxl0wo5GqPXyues=
+golang.org/x/net v0.59.0/go.mod h1:2DA/G1UfVbCpQPeWTmMPGY7Cs2PkBkwu743bVX5PIVg=
+golang.org/x/sys v0.48.0 h1:bbX/i/6MgT9BVLM9RT1thmxL04yeTAhbEz4SyadbXoo=
+golang.org/x/sys v0.48.0/go.mod h1:hNLxWAXmnKAxqDtdwIYC4bM9oQPEecfsnNMuSxOs3og=
+golang.org/x/term v0.46.0 h1:3+OXuTbaKDgwk8jTi3aSLHRlmWqHEUDUtxnbFigO4YE=
+golang.org/x/term v0.46.0/go.mod h1:+K02xbkittuwc0Am4abfA3Fc+XRGXkvBXNO88NCXPoc=
diff --git a/internal/transport/client.go b/internal/transport/client.go
index cc424df8..8f80efd9 100644
--- a/internal/transport/client.go
+++ b/internal/transport/client.go
@@ -52,7 +52,6 @@ func pooledTransport() *http.Transport {
 			DialContext: (&net.Dialer{
 				Timeout:   30 * time.Second,
 				KeepAlive: DefaultKeepAlive,
-				DualStack: true,
 			}).DialContext,
 			ForceAttemptHTTP2: true,
 		}