diff --git a/src/pipecat/adapters/services/anthropic_adapter.py b/src/pipecat/adapters/services/anthropic_adapter.py
index 4cecaf810..2429957e4 100644
--- a/src/pipecat/adapters/services/anthropic_adapter.py
+++ b/src/pipecat/adapters/services/anthropic_adapter.py
@@ -94,6 +94,8 @@ class AnthropicLLMAdapter(BaseLLMAdapter[AnthropicLLMInvocationParams]):
                     for item in msg["content"]:
                         if item["type"] == "image":
                             item["source"]["data"] = "..."
+                        if item["type"] == "thinking" and item.get("signature"):
+                            item["signature"] = "..."
             messages_for_logging.append(msg)
         return messages_for_logging
 
diff --git a/src/pipecat/adapters/services/gemini_adapter.py b/src/pipecat/adapters/services/gemini_adapter.py
index b504967de..ba9dffd87 100644
--- a/src/pipecat/adapters/services/gemini_adapter.py
+++ b/src/pipecat/adapters/services/gemini_adapter.py
@@ -151,6 +151,8 @@ class GeminiLLMAdapter(BaseLLMAdapter[GeminiLLMInvocationParams]):
                     for part in obj["parts"]:
                         if "inline_data" in part:
                             part["inline_data"]["data"] = "..."
+                        if "thought_signature" in part:
+                            part["thought_signature"] = "..."
             except Exception as e:
                 logger.debug(f"Error: {e}")
             messages_for_logging.append(obj)