diff --git a/Tool/Sources/OpenAIService/APIs/OpenAIChatCompletionsService.swift b/Tool/Sources/OpenAIService/APIs/OpenAIChatCompletionsService.swift
index 96e1a97a..2eab6489 100644
--- a/Tool/Sources/OpenAIService/APIs/OpenAIChatCompletionsService.swift
+++ b/Tool/Sources/OpenAIService/APIs/OpenAIChatCompletionsService.swift
@@ -134,14 +134,14 @@ actor OpenAIChatCompletionsService: ChatCompletionsStreamAPI, ChatCompletionsAPI
 
         struct Choice: Codable, Equatable {
             var message: Message
-            var index: Int
-            var finish_reason: String
+            var index: Int?
+            var finish_reason: String?
         }
 
         struct Usage: Codable, Equatable {
-            var prompt_tokens: Int
-            var completion_tokens: Int
-            var total_tokens: Int
+            var prompt_tokens: Int?
+            var completion_tokens: Int?
+            var total_tokens: Int?
         }
 
         var id: String?
@@ -287,7 +287,7 @@ actor OpenAIChatCompletionsService: ChatCompletionsStreamAPI, ChatCompletionsAPI
                 return .init(chunk: chunk, done: false)
             } catch {
                 Logger.service.error("Error decoding stream data: \(error)")
-                throw error
+                return .init(chunk: nil, done: false)
             }
         }
 
diff --git a/Version.xcconfig b/Version.xcconfig
index deb81403..c8e46a98 100644
--- a/Version.xcconfig
+++ b/Version.xcconfig
@@ -1,3 +1,3 @@
-APP_VERSION = 0.31.0
-APP_BUILD = 333
+APP_VERSION = 0.31.1
+APP_BUILD = 334
  
diff --git a/appcast.xml b/appcast.xml
index 5cb4561e..234647e1 100644
--- a/appcast.xml
+++ b/appcast.xml
@@ -2,6 +2,18 @@
 <rss xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle" version="2.0">
   <channel>
     <title>Copilot for Xcode</title>
+    <item>
+      <title>0.31.1</title>
+      <pubDate>Wed, 13 Mar 2024 21:24:28 +0800</pubDate>
+      <sparkle:version>334</sparkle:version>
+      <sparkle:shortVersionString>0.31.1</sparkle:shortVersionString>
+      <sparkle:minimumSystemVersion>12.0</sparkle:minimumSystemVersion>
+      <sparkle:releaseNotesLink>
+        https://github.com/intitni/CopilotForXcode/releases/tag/0.31.1
+      </sparkle:releaseNotesLink>
+      <enclosure url="https://github.com/intitni/CopilotForXcode/releases/download/0.31.1/Copilot.for.Xcode.app.zip" length="40209085" type="application/octet-stream" sparkle:edSignature="RyuAk0iYffsUpWrvxHqtVPIp+JYf7u6Y5zRk72mxsqU7A6L037NqCBdFlk4SWNwl++zmD42hXpY6oNe3dENnDQ=="/>
+    </item>
+
     <item>
       <title>0.31.0</title>
       <pubDate>Fri, 08 Mar 2024 14:48:32 +0800</pubDate>