diff --git a/src/bpe/algorithm.rs b/src/bpe/algorithm.rs
index fa230e9..e17200f 100644
--- a/src/bpe/algorithm.rs
+++ b/src/bpe/algorithm.rs
@@ -195,7 +195,7 @@ impl MergeState<'_, '_> {
     }
 
     #[inline]
-    pub fn iter(&self) -> Iter {
+    pub fn iter(&self) -> Iter<'_> {
         Iter {
             bpe: self.bpe,
             marks: &self.marks,
diff --git a/src/bpe/mod.rs b/src/bpe/mod.rs
index 8f04cb4..ce922a8 100644
--- a/src/bpe/mod.rs
+++ b/src/bpe/mod.rs
@@ -246,7 +246,7 @@ impl Bpe {
             "gpt2" => {
                 let pre_type = gguf.get_str("tokenizer.ggml.pre").unwrap();
                 let regex_str = match pre_type {
-                    "qwen2" | "deepseek-r1-qwen" => TOKENIZER_PRE_QWEN,
+                    "qwen2" | "deepseek-r1-qwen" | "olmo" => TOKENIZER_PRE_QWEN,
                     _ => unimplemented!("not supported pre_type {}", pre_type),
                 };
                 match scores {
@@ -337,7 +337,7 @@ impl Method for Bpe {
         vocab.into_iter()
     }
 
-    fn decode(&self, token: utok, buf: &mut TextBuf) -> Cow<[u8]> {
+    fn decode(&self, token: utok, buf: &mut TextBuf) -> Cow<'_, [u8]> {
         match &self.modeltype {
             Model::GPT2(_) => {
                 if self.special.contains(&token) {
diff --git a/src/lib.rs b/src/lib.rs
index 3b4e438..f55c358 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -23,7 +23,7 @@ pub trait Method {
     fn vocab_size(&self) -> usize;
     fn internal_special(&self) -> impl IntoIterator<Item = (&str, utok)>;
     fn encode(&self, text: &str) -> impl IntoIterator<Item = utok> + '_;
-    fn decode(&self, token: utok, buf: &mut TextBuf) -> Cow<[u8]>;
+    fn decode(&self, token: utok, buf: &mut TextBuf) -> Cow<'_, [u8]>;
     fn pre_encode<'s>(&self, text: &'s str) -> Cow<'s, str> {
         text.into()
     }
diff --git a/src/lpe/mod.rs b/src/lpe/mod.rs
index 6f858fa..b3eacef 100644
--- a/src/lpe/mod.rs
+++ b/src/lpe/mod.rs
@@ -165,7 +165,7 @@ impl Method for Lpe {
         tokens
     }
     #[inline]
-    fn decode(&self, token: utok, _buf: &mut TextBuf) -> Cow<[u8]> {
+    fn decode(&self, token: utok, _buf: &mut TextBuf) -> Cow<'_, [u8]> {
         self.token(token).into()
     }
 }