diff --git a/benchmark/src/generation.rs b/benchmark/src/generation.rs
index e00437c7..5e739703 100644
--- a/benchmark/src/generation.rs
+++ b/benchmark/src/generation.rs
@@ -157,7 +157,7 @@ async fn prefill(
             top_n_tokens: top_n_tokens.unwrap_or(0),
             blocks: vec![],
             slots: vec![],
-            adapter_index: None,
+            adapter_id: None,
         })
         .collect();
 
diff --git a/proto/v3/generate.proto b/proto/v3/generate.proto
index c7a8013b..926c878e 100644
--- a/proto/v3/generate.proto
+++ b/proto/v3/generate.proto
@@ -135,7 +135,7 @@ message Request {
     /// Paged attention slots
     repeated uint32  slots = 10;
     /// LORA adapter index
-    optional uint32 adapter_index = 11;
+    optional string adapter_id = 11;
 }
 
 message Batch {
diff --git a/router/client/src/v3/client.rs b/router/client/src/v3/client.rs
index 5ced4056..a996b14f 100644
--- a/router/client/src/v3/client.rs
+++ b/router/client/src/v3/client.rs
@@ -177,7 +177,7 @@ impl Client {
                 }),
                 prefill_logprobs: true,
                 top_n_tokens: 20,
-                adapter_index: None,
+                adapter_id: None,
             });
             n_tokens += max_input_length;
 
diff --git a/router/client/src/v3/sharded_client.rs b/router/client/src/v3/sharded_client.rs
index 300decca..ae8a899b 100644
--- a/router/client/src/v3/sharded_client.rs
+++ b/router/client/src/v3/sharded_client.rs
@@ -244,7 +244,7 @@ impl Health for ShardedClient {
             // Block 0 is reserved for health checks
             blocks: vec![0],
             slots: (0..16).collect(),
-            adapter_index: None,
+            adapter_id: None,
         };
         let batch = Batch {
             id: u64::MAX,
diff --git a/router/src/infer/v2/queue.rs b/router/src/infer/v2/queue.rs
index f0205697..93cf9469 100644
--- a/router/src/infer/v2/queue.rs
+++ b/router/src/infer/v2/queue.rs
@@ -429,7 +429,7 @@ mod tests {
                     stop_sequences: vec![],
                 },
                 top_n_tokens: 0,
-                adapter_index: None,
+                adapter_id: None,
             },
             response_tx,
             span: info_span!("entry"),
diff --git a/router/src/infer/v3/queue.rs b/router/src/infer/v3/queue.rs
index fbfdf715..ba65b9b6 100644
--- a/router/src/infer/v3/queue.rs
+++ b/router/src/infer/v3/queue.rs
@@ -351,7 +351,7 @@ impl State {
                 top_n_tokens: entry.request.top_n_tokens,
                 blocks,
                 slots,
-                adapter_index: entry.request.adapter_index,
+                adapter_id: entry.request.adapter_id.clone(),
             });
             // Set batch_time
             entry.batch_time = Some(Instant::now());
@@ -492,7 +492,7 @@ mod tests {
                     stop_sequences: vec![],
                 },
                 top_n_tokens: 0,
-                adapter_index: None,
+                adapter_id: None,
             },
             response_tx,
             span: info_span!("entry"),
diff --git a/router/src/lib.rs b/router/src/lib.rs
index c99e8281..08d57873 100644
--- a/router/src/lib.rs
+++ b/router/src/lib.rs
@@ -302,7 +302,7 @@ pub(crate) struct GenerateParameters {
     /// Lora adapter id
     #[serde(default)]
     #[schema(nullable = true, default = "null", example = "null")]
-    pub adapter_index: Option<u32>,
+    pub adapter_id: Option<String>,
 }
 
 fn default_max_new_tokens() -> Option<u32> {
@@ -329,7 +329,7 @@ fn default_parameters() -> GenerateParameters {
         seed: None,
         top_n_tokens: None,
         grammar: None,
-        adapter_index: None,
+        adapter_id: None,
     }
 }
 
diff --git a/router/src/validation.rs b/router/src/validation.rs
index 6f776870..e2bf5a5d 100644
--- a/router/src/validation.rs
+++ b/router/src/validation.rs
@@ -202,7 +202,7 @@ impl Validation {
             decoder_input_details,
             top_n_tokens,
             grammar,
-            adapter_index,
+            adapter_id,
             ..
         } = request.parameters;
 
@@ -384,7 +384,7 @@ impl Validation {
             parameters,
             stopping_parameters,
             top_n_tokens,
-            adapter_index,
+            adapter_id,
         })
     }
 
@@ -680,7 +680,7 @@ pub(crate) struct ValidGenerateRequest {
     pub parameters: ValidParameters,
     pub stopping_parameters: ValidStoppingParameters,
     pub top_n_tokens: u32,
-    pub adapter_index: Option<u32>,
+    pub adapter_id: Option<String>,
 }
 
 #[derive(Error, Debug)]