diff --git a/autogen/oai/openai_utils.py b/autogen/oai/openai_utils.py
index 2512a75ba257..a2b2aa42aaf7 100644
--- a/autogen/oai/openai_utils.py
+++ b/autogen/oai/openai_utils.py
@@ -108,7 +108,7 @@ def is_valid_api_key(api_key: str) -> bool:
     Returns:
         bool: A boolean that indicates if input is valid OpenAI API key.
     """
-    api_key_re = re.compile(r"^sk-([A-Za-z0-9]+(-+[A-Za-z0-9]+)*-)?[A-Za-z0-9_]{32,}$")
+    api_key_re = re.compile(r"^sk-([A-Za-z0-9]+(-+[A-Za-z0-9]+)*-)?[A-Za-z0-9_-]{32,}$")
     return bool(re.fullmatch(api_key_re, api_key))
 
 
diff --git a/test/oai/test_utils.py b/test/oai/test_utils.py
index 21f3c2aaeada..a79a56d27e4c 100755
--- a/test/oai/test_utils.py
+++ b/test/oai/test_utils.py
@@ -432,9 +432,10 @@ def test_is_valid_api_key():
     assert is_valid_api_key("sk-aut0gen-asajsdjsd22372X23kjdfdfdf2329ffUUDSDS12121212212")
     assert is_valid_api_key("sk-aut0-gen-asajsdjsd22372X23kjdfdfdf2329ffUUDSDS12121212212")
     assert is_valid_api_key("sk-aut0--gen-asajsdjsd22372X23kjdfdfdf2329ffUUDSDS12121212212")
-    assert not is_valid_api_key("sk-aut0-gen--asajsdjsd22372X23kjdfdfdf2329ffUUDSDS12121212212")
-    assert not is_valid_api_key("sk-abc_def-ghijklmnopqrstuvwxyz0123456789ABCDEFGH")
-    assert not is_valid_api_key("sk--aut0-gen-asajsdjsd22372X23kjdfdfdf2329ffUUDSDS12121212212")
+    assert is_valid_api_key("sk-proj-mhsJPwdSvNpTPo7V7nXXX--sAUco3WfNB7D77JY6wNmIFWXXXXXXXXXXXXXXXXXXX4NE")
+    assert is_valid_api_key("sk-aut0-gen--asajsdjsd22372X23kjdfdfdf2329ffUUDSDS12121212212")
+    assert is_valid_api_key("sk-abc_def-ghijklmnopqrstuvwxyz0123456789ABCDEFGH")
+    assert is_valid_api_key("sk--aut0-gen-asajsdjsd22372X23kjdfdfdf2329ffUUDSDS12121212212")
     assert is_valid_api_key(MOCK_OPEN_AI_API_KEY)