diff --git a/src/go-postgres/README.md b/src/go-postgres/README.md
index f1aac8ba..ac9bb3da 100644
--- a/src/go-postgres/README.md
+++ b/src/go-postgres/README.md
@@ -7,7 +7,7 @@ Use and develop Go + Postgres applications. Includes appropriate runtime args, G
 
 | Options Id | Description | Type | Default Value |
 |-----|-----|-----|-----|
-| imageVariant | Go version: | string | 1.25-trixie |
+| imageVariant | Go version: | string | 1.26-trixie |
 
 This template references an image that was [pre-built](https://containers.dev/implementors/reference/#prebuilding) to automatically include needed devcontainer.json metadata.
 
diff --git a/src/go-postgres/devcontainer-template.json b/src/go-postgres/devcontainer-template.json
index 759d6d36..3df128e3 100644
--- a/src/go-postgres/devcontainer-template.json
+++ b/src/go-postgres/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "go-postgres",
-    "version": "5.0.0",
+    "version": "6.0.0",
     "name": "Go & PostgreSQL",
     "description": "Use and develop Go + Postgres applications. Includes appropriate runtime args, Go, common tools, extensions, and dependencies.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/go-postgres",
@@ -11,16 +11,12 @@
             "type": "string",
             "description": "Go version:",
             "proposals": [
-                "1-trixie",
+				"1.26-trixie",
 				"1.25-trixie",
-				"1.24-trixie",
-				"1-bookworm",
-				"1.25-bookworm",
-                "1.24-bookworm",
-                "1-bullseye",
-                "1.24-bullseye"
+				"1.26-bookworm",
+				"1.25-bookworm"
             ],
-            "default": "1.25-trixie"
+            "default": "1.26-trixie"
         }
     },
     "platforms": ["Go"],
diff --git a/src/go/README.md b/src/go/README.md
index 35c83739..77a96d2a 100644
--- a/src/go/README.md
+++ b/src/go/README.md
@@ -7,7 +7,7 @@ Develop Go based applications. Includes appropriate runtime args, Go, common too
 
 | Options Id | Description | Type | Default Value |
 |-----|-----|-----|-----|
-| imageVariant | Go version: | string | 1.25-trixie |
+| imageVariant | Go version: | string | 1.26-trixie |
 
 This template references an image that was [pre-built](https://containers.dev/implementors/reference/#prebuilding) to automatically include needed devcontainer.json metadata.
 
diff --git a/src/go/devcontainer-template.json b/src/go/devcontainer-template.json
index 79c4a1ae..756a7d5a 100644
--- a/src/go/devcontainer-template.json
+++ b/src/go/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "go",
-    "version": "5.0.0",
+    "version": "6.0.0",
     "name": "Go",
     "description": "Develop Go based applications. Includes appropriate runtime args, Go, common tools, extensions, and dependencies.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/go",
@@ -11,14 +11,12 @@
             "type": "string",
             "description": "Go version:",
             "proposals": [
-				"1-trixie",
-				"1.24-trixie",
+				"1.26-trixie",
 				"1.25-trixie",
-                "1.25-bookworm",
-                "1.24-bookworm",
-                "1.24-bullseye"
+				"1.26-bookworm",
+                "1.25-bookworm"
             ],
-            "default": "1.25-trixie"
+            "default": "1.26-trixie"
         }
     },
     "platforms": ["Go"],
diff --git a/test/go-postgres/test.sh b/test/go-postgres/test.sh
index c94143ec..cfe60ba4 100644
--- a/test/go-postgres/test.sh
+++ b/test/go-postgres/test.sh
@@ -9,6 +9,17 @@ checkCommon
 # Run template specific tests
 checkExtension "golang.Go"
 
+echo "=== DNS diagnostics ==="
+echo "--- /etc/resolv.conf ---"
+cat /etc/resolv.conf || true
+echo "--- getent hosts proxy.golang.org ---"
+getent hosts proxy.golang.org || true
+echo "--- getent hosts github.com ---"
+getent hosts github.com || true
+echo "--- curl proxy.golang.org (headers) ---"
+curl -I https://proxy.golang.org 2>/dev/null | head -n 5 || true
+echo "======================="
+
 check "lib pq check" go list github.com/lib/pq
 check "go test program" go run hello.go