diff --git a/router/src/lib.rs b/router/src/lib.rs
index d5e551a0..9ecfa051 100644
--- a/router/src/lib.rs
+++ b/router/src/lib.rs
@@ -90,18 +90,6 @@ impl TokenizerConfigToken {
     }
 }
 
-impl From<TokenizerConfigToken> for String {
-    fn from(token: TokenizerConfigToken) -> Self {
-        token.as_str().to_string()
-    }
-}
-
-impl From<String> for TokenizerConfigToken {
-    fn from(s: String) -> Self {
-        TokenizerConfigToken::String(s)
-    }
-}
-
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(tag = "processor_class")]
 pub enum HubPreprocessorConfig {
diff --git a/router/src/main.rs b/router/src/main.rs
index 1e8093d8..9a281556 100644
--- a/router/src/main.rs
+++ b/router/src/main.rs
@@ -553,11 +553,11 @@ pub fn create_post_processor(
     if add_bos_token {
         if let Some(bos) = bos_token {
             let bos_token_id = tokenizer
-                .token_to_id(bos)
+                .token_to_id(bos.as_str())
                 .expect("Should have found the bos token id");
-            special_tokens.push((bos.clone(), bos_token_id));
-            single.push(format!("{}:0", bos));
-            pair.push(format!("{}:0", bos));
+            special_tokens.push((bos.as_str(), bos_token_id));
+            single.push(format!("{}:0", bos.as_str()));
+            pair.push(format!("{}:0", bos.as_str()));
         }
     }
 
@@ -567,17 +567,17 @@ pub fn create_post_processor(
     if add_eos_token {
         if let Some(eos) = eos_token {
             let eos_token_id = tokenizer
-                .token_to_id(eos)
+                .token_to_id(eos.as_str())
                 .expect("Should have found the eos token id");
-            special_tokens.push((eos.clone(), eos_token_id));
-            single.push(format!("{}:0", eos));
-            pair.push(format!("{}:0", eos));
+            special_tokens.push((eos.as_str(), eos_token_id));
+            single.push(format!("{}:0", eos.as_str()));
+            pair.push(format!("{}:0", eos.as_str()));
         }
     }
 
     if add_bos_token {
         if let Some(bos) = bos_token {
-            single.push(format!("{}:1", bos));
+            single.push(format!("{}:1", bos.as_str()));
         }
     }
 
@@ -585,7 +585,7 @@ pub fn create_post_processor(
 
     if add_eos_token {
         if let Some(eos) = eos_token {
-            pair.push(format!("{}:1", eos));
+            pair.push(format!("{}:1", eos.as_str()));
         }
     }
 
@@ -611,14 +611,15 @@ enum RouterError {
 #[cfg(test)]
 mod tests {
     use super::*;
+    use text_generation_router::TokenizerConfigToken;
 
     #[test]
     fn test_create_post_processor() {
         let tokenizer_config = HubTokenizerConfig {
             add_bos_token: None,
             add_eos_token: None,
-            bos_token: Some("<s>".to_string()),
-            eos_token: Some("</s>".to_string()),
+            bos_token: Some(TokenizerConfigToken::String("<s>".to_string())),
+            eos_token: Some(TokenizerConfigToken::String("</s>".to_string())),
             chat_template: None,
             tokenizer_class: None,
             completion_template: None,