diff --git a/rustfs/src/admin/handlers/user.rs b/rustfs/src/admin/handlers/user.rs
index c4a879e53..500c9de35 100644
--- a/rustfs/src/admin/handlers/user.rs
+++ b/rustfs/src/admin/handlers/user.rs
@@ -306,8 +306,8 @@ impl Operation for AddUser {
         }
 
         let mut header = HeaderMap::new();
-        header.insert(CONTENT_TYPE, "application/json".parse().unwrap());
-        header.insert(CONTENT_LENGTH, "0".parse().unwrap());
+        header.insert(CONTENT_TYPE, "application/json".parse().expect("valid header value"));
+        header.insert(CONTENT_LENGTH, "0".parse().expect("valid header value"));
         Ok(S3Response::with_headers((StatusCode::OK, Body::empty()), header))
     }
 }
@@ -366,8 +366,8 @@ impl Operation for SetUserStatus {
             .map_err(|e| S3Error::with_message(S3ErrorCode::InternalError, format!("failed to set user status: {e}")))?;
 
         let mut header = HeaderMap::new();
-        header.insert(CONTENT_TYPE, "application/json".parse().unwrap());
-        header.insert(CONTENT_LENGTH, "0".parse().unwrap());
+        header.insert(CONTENT_TYPE, "application/json".parse().expect("valid header value"));
+        header.insert(CONTENT_LENGTH, "0".parse().expect("valid header value"));
         Ok(S3Response::with_headers((StatusCode::OK, Body::empty()), header))
     }
 }
@@ -431,7 +431,7 @@ impl Operation for ListUsers {
         let (data, content_type) = encode_compatible_admin_payload(req.uri.path(), &cred.secret_key, data)?;
 
         let mut header = HeaderMap::new();
-        header.insert(CONTENT_TYPE, content_type.parse().unwrap());
+        header.insert(CONTENT_TYPE, content_type.parse().expect("valid header value"));
 
         Ok(S3Response::with_headers((StatusCode::OK, Body::from(data)), header))
     }
@@ -532,8 +532,8 @@ impl Operation for RemoveUser {
         }
 
         let mut header = HeaderMap::new();
-        header.insert(CONTENT_TYPE, "application/json".parse().unwrap());
-        header.insert(CONTENT_LENGTH, "0".parse().unwrap());
+        header.insert(CONTENT_TYPE, "application/json".parse().expect("valid header value"));
+        header.insert(CONTENT_LENGTH, "0".parse().expect("valid header value"));
         Ok(S3Response::with_headers((StatusCode::OK, Body::empty()), header))
     }
 }
@@ -606,7 +606,7 @@ impl Operation for GetUserInfo {
             .map_err(|e| S3Error::with_message(S3ErrorCode::InternalError, format!("failed to serialize response: {e}")))?;
 
         let mut header = HeaderMap::new();
-        header.insert(CONTENT_TYPE, "application/json".parse().unwrap());
+        header.insert(CONTENT_TYPE, "application/json".parse().expect("valid header value"));
 
         Ok(S3Response::with_headers((StatusCode::OK, Body::from(data)), header))
     }
@@ -840,9 +840,9 @@ impl Operation for ExportIam {
             .finish()
             .map_err(|e| S3Error::with_message(S3ErrorCode::InternalError, e.to_string()))?;
         let mut header = HeaderMap::new();
-        header.insert(CONTENT_TYPE, "application/zip".parse().unwrap());
-        header.insert(CONTENT_DISPOSITION, "attachment; filename=iam-assets.zip".parse().unwrap());
-        header.insert(CONTENT_LENGTH, zip_bytes.get_ref().len().to_string().parse().unwrap());
+        header.insert(CONTENT_TYPE, "application/zip".parse().expect("valid header value"));
+        header.insert(CONTENT_DISPOSITION, "attachment; filename=iam-assets.zip".parse().expect("valid header value"));
+        header.insert(CONTENT_LENGTH, zip_bytes.get_ref().len().to_string().parse().expect("valid header value"));
         Ok(S3Response::with_headers((StatusCode::OK, Body::from(zip_bytes.into_inner())), header))
     }
 }
@@ -1291,7 +1291,7 @@ impl Operation for ImportIam {
         let body = serde_json::to_vec(&ret).map_err(|e| S3Error::with_message(S3ErrorCode::InternalError, e.to_string()))?;
 
         let mut header = HeaderMap::new();
-        header.insert(CONTENT_TYPE, "application/json".parse().unwrap());
+        header.insert(CONTENT_TYPE, "application/json".parse().expect("valid header value"));
 
         Ok(S3Response::with_headers((StatusCode::OK, Body::from(body)), header))
     }