diff --git a/config/config.yaml b/config/config.yaml
index 2f747b7..40fd8b6 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -6,6 +6,7 @@ models:
     endpoint: https://api.openai.com/v1/chat/completions
     auth_env_var: OPENAI_API_KEY
     org_env_var: OPENAI_ORG_ID
+    project_env_var: OPENAI_PROJECT_ID
     prompt:
       [
         {
@@ -20,6 +21,7 @@ models:
     endpoint: https://api.openai.com/v1/chat/completions
     auth_env_var: OPENAI_API_KEY
     org_env_var: OPENAI_ORG_ID
+    project_env_var: OPENAI_PROJECT_ID
     prompt:
       [
         {
@@ -34,6 +36,7 @@ models:
     endpoint: https://api.openai.com/v1/chat/completions
     auth_env_var: OPENAI_API_KEY
     org_env_var: OPENAI_ORG_ID
+    project_env_var: OPENAI_PROJECT_ID
     prompt:
       [
         {
diff --git a/llm/llm.go b/llm/llm.go
index 35e43e5..ee3839f 100644
--- a/llm/llm.go
+++ b/llm/llm.go
@@ -48,6 +48,9 @@ func (c *LLMClient) createRequest(payload Payload) (*http.Request, error) {
 	if c.config.OrgID != "" {
 		req.Header.Set("OpenAI-Organization", c.config.OrgID)
 	}
+	if c.config.ProjectID != "" {
+		req.Header.Set("OpenAI-Project", c.config.ProjectID)
+	}
 	req.Header.Set("Content-Type", "application/json")
 	return req, nil
 }
diff --git a/types/types.go b/types/types.go
index 525fb94..1f0c88b 100644
--- a/types/types.go
+++ b/types/types.go
@@ -5,6 +5,7 @@ type ModelConfig struct {
 	Endpoint  string    `yaml:"endpoint"`
 	Auth      string    `yaml:"auth_env_var"`
 	OrgID     string    `yaml:"org_env_var,omitempty"`
+	ProjectID string    `yaml:"project_env_var,omitempty"`
 	Prompt    []Message `yaml:"prompt"`
 }