diff --git a/CHANGELOG.md b/CHANGELOG.md
index c80fb43..9475126 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,9 +8,16 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 ---
 
 ## [Unreleased]
+
+---
+
+## [5.1.0] - 2024-07-08
 ### Added
 - Add validation flowchart
 - Add support for unmapped BAM
+- Add additional MIME type for GZIP compressed files
+- Add support for checksum files formatted with any whitespace separator
+
 ---
 
 ## [5.0.0] - 2024-02-16
diff --git a/pipeval/generate_checksum/checksum.py b/pipeval/generate_checksum/checksum.py
index e522c8a..400053d 100644
--- a/pipeval/generate_checksum/checksum.py
+++ b/pipeval/generate_checksum/checksum.py
@@ -29,7 +29,7 @@ def _validate_checksums(path:Path):
 def _compare_hash(hash_type:str, path:Path, hash_path:Path):
     ''' Compares existing hash to generated hash '''
     # Read only the hash and not the filename for comparison
-    existing_hash = hash_path.read_text().split(' ')[0].strip()
+    existing_hash = hash_path.read_text().split()[0].strip()
 
     if hash_type == 'md5':
         return existing_hash == _generate_md5(path)
diff --git a/pipeval/validate/files.py b/pipeval/validate/files.py
index 9d249be..add2789 100644
--- a/pipeval/validate/files.py
+++ b/pipeval/validate/files.py
@@ -11,6 +11,7 @@ def _identify_compression(path:Path):
     ''' Identify compression type and returns appropriate file handler '''
     compression_handlers = {
         'application/x-gzip': gzip.open,
+        'application/gzip': gzip.open,
         'application/x-bzip2': bz2.open
     }