diff --git a/eng/Packages.Data.props b/eng/Packages.Data.props
index b313c69fa3e1..bdd56374acaf 100644
--- a/eng/Packages.Data.props
+++ b/eng/Packages.Data.props
@@ -466,7 +466,7 @@
 
   <PropertyGroup>
     <TestProxyVersion>1.0.0-dev.20250805.1</TestProxyVersion>
-    <UnbrandedGeneratorVersion>1.0.0-alpha.20250910.2</UnbrandedGeneratorVersion>
+    <UnbrandedGeneratorVersion>1.0.0-alpha.20250911.1</UnbrandedGeneratorVersion>
     <AzureGeneratorVersion>1.0.0-alpha.20250903.2</AzureGeneratorVersion>
   </PropertyGroup>
 </Project>
\ No newline at end of file
diff --git a/eng/http-client-csharp-emitter-package-lock.json b/eng/http-client-csharp-emitter-package-lock.json
index e810f713843b..d12032976c80 100644
--- a/eng/http-client-csharp-emitter-package-lock.json
+++ b/eng/http-client-csharp-emitter-package-lock.json
@@ -5,7 +5,7 @@
   "packages": {
     "": {
       "dependencies": {
-        "@typespec/http-client-csharp": "1.0.0-alpha.20250910.2",
+        "@typespec/http-client-csharp": "1.0.0-alpha.20250911.1",
         "client-plugin": "file:../../../../eng/packages/plugins/client"
       },
       "devDependencies": {
@@ -592,9 +592,9 @@
       }
     },
     "node_modules/@typespec/http-client-csharp": {
-      "version": "1.0.0-alpha.20250910.2",
-      "resolved": "https://registry.npmjs.org/@typespec/http-client-csharp/-/http-client-csharp-1.0.0-alpha.20250910.2.tgz",
-      "integrity": "sha512-iFGG7W0aCgAZwNK2NpxdFfQgOrh/nf78oEcfx/XwwgHCgAMbKxCHqzk5LkBuWjFqlvuXd0lrzspEbQnDJVEiKA==",
+      "version": "1.0.0-alpha.20250911.1",
+      "resolved": "https://registry.npmjs.org/@typespec/http-client-csharp/-/http-client-csharp-1.0.0-alpha.20250911.1.tgz",
+      "integrity": "sha512-/Ur9TJF9dyUS54UG+p/a8KcW4/GqXzapDSqILyUNmaxtV8Z7oggV01/KSt/ldHJpt+hEEekUNSm4kSmvlb8qcQ==",
       "license": "MIT",
       "peerDependencies": {
         "@azure-tools/typespec-azure-core": ">=0.60.0 < 0.61.0 || ~0.61.0-0",
@@ -1625,4 +1625,4 @@
       }
     }
   }
-}
\ No newline at end of file
+}
diff --git a/eng/http-client-csharp-emitter-package.json b/eng/http-client-csharp-emitter-package.json
index e9f9ecc54f4e..b5973e07c0eb 100644
--- a/eng/http-client-csharp-emitter-package.json
+++ b/eng/http-client-csharp-emitter-package.json
@@ -2,7 +2,7 @@
   "main": "dist/src/index.js",
   "dependencies": {
     "client-plugin": "file:../../../../eng/packages/plugins/client",
-    "@typespec/http-client-csharp": "1.0.0-alpha.20250910.2"
+    "@typespec/http-client-csharp": "1.0.0-alpha.20250911.1"
   },
   "devDependencies": {
     "@azure-tools/typespec-azure-core": "0.60.0",
diff --git a/eng/packages/http-client-csharp/package-lock.json b/eng/packages/http-client-csharp/package-lock.json
index e8c182fadd0b..c61ce06b2e7e 100644
--- a/eng/packages/http-client-csharp/package-lock.json
+++ b/eng/packages/http-client-csharp/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.0.0",
       "license": "MIT",
       "dependencies": {
-        "@typespec/http-client-csharp": "1.0.0-alpha.20250910.2"
+        "@typespec/http-client-csharp": "1.0.0-alpha.20250911.1"
       },
       "devDependencies": {
         "@azure-tools/azure-http-specs": "0.1.0-alpha.28",
@@ -2764,9 +2764,9 @@
       }
     },
     "node_modules/@typespec/http-client-csharp": {
-      "version": "1.0.0-alpha.20250910.2",
-      "resolved": "https://registry.npmjs.org/@typespec/http-client-csharp/-/http-client-csharp-1.0.0-alpha.20250910.2.tgz",
-      "integrity": "sha512-iFGG7W0aCgAZwNK2NpxdFfQgOrh/nf78oEcfx/XwwgHCgAMbKxCHqzk5LkBuWjFqlvuXd0lrzspEbQnDJVEiKA==",
+      "version": "1.0.0-alpha.20250911.1",
+      "resolved": "https://registry.npmjs.org/@typespec/http-client-csharp/-/http-client-csharp-1.0.0-alpha.20250911.1.tgz",
+      "integrity": "sha512-/Ur9TJF9dyUS54UG+p/a8KcW4/GqXzapDSqILyUNmaxtV8Z7oggV01/KSt/ldHJpt+hEEekUNSm4kSmvlb8qcQ==",
       "license": "MIT",
       "peerDependencies": {
         "@azure-tools/typespec-azure-core": ">=0.60.0 < 0.61.0 || ~0.61.0-0",
diff --git a/eng/packages/http-client-csharp/package.json b/eng/packages/http-client-csharp/package.json
index a0e4f785c4be..1eb07dc92f8e 100644
--- a/eng/packages/http-client-csharp/package.json
+++ b/eng/packages/http-client-csharp/package.json
@@ -38,7 +38,7 @@
     "dist/generator/**"
   ],
   "dependencies": {
-    "@typespec/http-client-csharp": "1.0.0-alpha.20250910.2"
+    "@typespec/http-client-csharp": "1.0.0-alpha.20250911.1"
   },
   "devDependencies": {
     "@azure-tools/azure-http-specs": "0.1.0-alpha.28",