diff --git a/CHANGELOG.md b/CHANGELOG.md
index 31cc83ffb..609e83f81 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+* Fix crash when parsing FITS header long value ([#1366](https://github.com/CARTAvis/carta-backend/issues/1366)).
+
 ### Changed
 * Move the loader cache to separate files ([#1021](https://github.com/CARTAvis/carta-backend/issues/1021)).
 * Improve the code style in HTTP server ([#1260](https://github.com/CARTAvis/carta-backend/issues/1260)).
diff --git a/src/ImageData/CompressedFits.cc b/src/ImageData/CompressedFits.cc
index 49ffa2e33..7e9c9dda5 100644
--- a/src/ImageData/CompressedFits.cc
+++ b/src/ImageData/CompressedFits.cc
@@ -414,6 +414,10 @@ void CompressedFits::AddHeaderEntry(
             } catch (std::invalid_argument) {
                 // Set string value only
                 entry->set_entry_type(CARTA::EntryType::STRING);
+            } catch (std::out_of_range) {
+                long lvalue = std::stol(value);
+                entry->set_numeric_value(lvalue);
+                entry->set_entry_type(CARTA::EntryType::INT);
             }
         }
     }