diff --git a/api/services/configuration/registry.py b/api/services/configuration/registry.py
index f433981..4e828b2 100644
--- a/api/services/configuration/registry.py
+++ b/api/services/configuration/registry.py
@@ -332,6 +332,7 @@ class CartesiaTTSConfiguration(BaseTTSConfiguration):
         default="sonic-3", json_schema_extra={"examples": CARTESIA_TTS_MODELS}
     )
     voice: str = Field(default="3faa81ae-d3d8-4ab1-9e44-e50e46d33c30")
+    speed: float = Field(default=1.0, ge=0.6, le=1.5, description="Speed of the voice")
 
 
 SARVAM_TTS_MODELS = ["bulbul:v2", "bulbul:v3"]
diff --git a/api/services/pipecat/service_factory.py b/api/services/pipecat/service_factory.py
index 0ffd44e..caf3234 100644
--- a/api/services/pipecat/service_factory.py
+++ b/api/services/pipecat/service_factory.py
@@ -8,7 +8,7 @@ from api.services.configuration.registry import ServiceProviders
 from pipecat.services.aws.llm import AWSBedrockLLMService, AWSBedrockLLMSettings
 from pipecat.services.azure.llm import AzureLLMService, AzureLLMSettings
 from pipecat.services.cartesia.stt import CartesiaSTTService
-from pipecat.services.cartesia.tts import CartesiaTTSService, CartesiaTTSSettings
+from pipecat.services.cartesia.tts import CartesiaTTSService, CartesiaTTSSettings, GenerationConfig
 from pipecat.services.deepgram.flux.stt import (
     DeepgramFluxSTTService,
     DeepgramFluxSTTSettings,
@@ -211,11 +211,14 @@ def create_tts_service(user_config, audio_config: "AudioConfig"):
             silence_time_s=1.0,
         )
     elif user_config.tts.provider == ServiceProviders.CARTESIA.value:
+        speed = getattr(user_config.tts, "speed", None)
+        generation_config = GenerationConfig(speed=speed) if speed and speed != 1.0 else None
         return CartesiaTTSService(
             api_key=user_config.tts.api_key,
             settings=CartesiaTTSSettings(
                 voice=user_config.tts.voice,
                 model=user_config.tts.model,
+                **({"generation_config": generation_config} if generation_config else {}),
             ),
             text_filters=[xml_function_tag_filter],
             silence_time_s=1.0,