diff --git a/package-lock.json b/package-lock.json
index 94e3806..743222a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,7 @@
       "devDependencies": {
         "@types/jest": "^29.5.3",
         "jest": "^29.6.1",
-        "openai": "^4.2.0",
+        "openai": "^4.10.0",
         "prettier": "^3.0.2",
         "ts-jest": "^29.1.1",
         "typescript": "^5.1.6"
@@ -3089,9 +3089,9 @@
       }
     },
     "node_modules/openai": {
-      "version": "4.2.0",
-      "resolved": "https://registry.npmjs.org/openai/-/openai-4.2.0.tgz",
-      "integrity": "sha512-zfvpO2eITIxIjTG8T6Cek7NB2dMvP/LW0TRUJ4P9E8+qbBNKw00DrtfF64b+fAV2+wUYCVyynT6iSycJ//TtbA==",
+      "version": "4.10.0",
+      "resolved": "https://registry.npmjs.org/openai/-/openai-4.10.0.tgz",
+      "integrity": "sha512-II4b5/7qzwYkqA9MSjgqdofCc798EW+dtF2h6qNaVLet+qO7FShAJTWnoyzb50J4ZH1rPxRFAsmDLIhY3PT6DQ==",
       "dev": true,
       "dependencies": {
         "@types/node": "^18.11.18",
diff --git a/package.json b/package.json
index 9717443..5b689b5 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   "devDependencies": {
     "@types/jest": "^29.5.3",
     "jest": "^29.6.1",
-    "openai": "^4.2.0",
+    "openai": "^4.10.0",
     "prettier": "^3.0.2",
     "ts-jest": "^29.1.1",
     "typescript": "^5.1.6"
@@ -37,4 +37,4 @@
   "prettier": {
     "trailingComma": "all"
   }
-}
\ No newline at end of file
+}
diff --git a/src/functions.ts b/src/functions.ts
index cd917f3..51e3c10 100644
--- a/src/functions.ts
+++ b/src/functions.ts
@@ -1,6 +1,6 @@
 import OpenAI from "openai";
 
-type OpenAIFunction = OpenAI.Chat.CompletionCreateParams.Function;
+type OpenAIFunction = OpenAI.Chat.ChatCompletionCreateParams.Function;
 
 // Types representing the OpenAI function definitions. While the OpenAI client library
 // does have types for function definitions, the properties are just Record<string, unknown>,
diff --git a/src/index.ts b/src/index.ts
index 243c99b..f27dd84 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,9 +2,9 @@ import OpenAI from "openai";
 import { Tiktoken, getEncoding } from "js-tiktoken";
 import { FunctionDef, formatFunctionDefinitions } from "./functions";
 
-type Message = OpenAI.Chat.CreateChatCompletionRequestMessage;
-type Function = OpenAI.Chat.CompletionCreateParams.Function;
-type FunctionCall = OpenAI.Chat.CompletionCreateParams.FunctionCallOption;
+type Message = OpenAI.Chat.ChatCompletionMessageParam;
+type Function = OpenAI.Chat.ChatCompletionCreateParams.Function;
+type FunctionCall = OpenAI.Chat.ChatCompletionCreateParams.FunctionCallOption;
 
 let encoder: Tiktoken | undefined;
 
diff --git a/tests/token-counts.test.ts b/tests/token-counts.test.ts
index df93e4f..5eb8753 100644
--- a/tests/token-counts.test.ts
+++ b/tests/token-counts.test.ts
@@ -1,9 +1,9 @@
 import OpenAI from "openai";
 import { promptTokensEstimate } from "../src";
 
-type Message = OpenAI.Chat.CreateChatCompletionRequestMessage;
-type Function = OpenAI.Chat.CompletionCreateParams.Function;
-type FunctionCall = OpenAI.Chat.CompletionCreateParams.FunctionCallOption;
+type Message = OpenAI.Chat.ChatCompletionMessageParam;
+type Function = OpenAI.Chat.ChatCompletionCreateParams.Function;
+type FunctionCall = OpenAI.Chat.ChatCompletionCreateParams.FunctionCallOption;
 type Example = {
   messages: Message[];
   functions?: Function[];