diff --git a/litellm/llms/ollama_chat.py b/litellm/llms/ollama_chat.py
index 8378a95ff..cebdbb74a 100644
--- a/litellm/llms/ollama_chat.py
+++ b/litellm/llms/ollama_chat.py
@@ -134,6 +134,7 @@ class OllamaChatConfig:
             "tools",
             "tool_choice",
             "functions",
+            "response_format",
         ]
 
     def map_openai_params(self, non_default_params: dict, optional_params: dict):
@@ -150,6 +151,8 @@ class OllamaChatConfig:
                 optional_params["repeat_penalty"] = param
             if param == "stop":
                 optional_params["stop"] = value
+            if param == "response_format" and value["type"] == "json_object":
+                optional_params["format"] = "json"
             ### FUNCTION CALLING LOGIC ###
             if param == "tools":
                 # ollama actually supports json output
diff --git a/litellm/utils.py b/litellm/utils.py
index bcef061d6..a8c003181 100644
--- a/litellm/utils.py
+++ b/litellm/utils.py
@@ -4860,6 +4860,8 @@ def get_optional_params(
             optional_params["repeat_penalty"] = frequency_penalty
         if stop is not None:
             optional_params["stop"] = stop
+        if response_format is not None and response_format["type"] == "json_object":
+            optional_params["format"] = "json"
     elif custom_llm_provider == "ollama_chat":
         supported_params = litellm.OllamaChatConfig().get_supported_openai_params()
 
@@ -5320,6 +5322,7 @@ def get_supported_openai_params(model: str, custom_llm_provider: str):
             "temperature",
             "frequency_penalty",
             "stop",
+            "response_format",
         ]
     elif custom_llm_provider == "nlp_cloud":
         return [