diff --git a/code/formatters/spdx.py b/code/formatters/spdx.py
index f5f11d3..81f48c4 100644
--- a/code/formatters/spdx.py
+++ b/code/formatters/spdx.py
@@ -16,6 +16,8 @@
 from json import dumps, loads
 from uuid import uuid4
 from io import StringIO
+from spdx.checksum import Algorithm, sha1, sha512
+import hashlib
 
 
 APP_VERSION = os.environ.get("SERVICE_VERSION", "0.0.0")
@@ -36,7 +38,12 @@ def create_base_spdx_document(name) -> Document:
     return newDocument
 
 def create_spdx_namespace(documentName: str) -> str:
-    return f'{SPDX_NAMESPACE_BASE}{documentName}-{uuid4()}'
+    namespace = f'{SPDX_NAMESPACE_BASE}{documentName}-{uuid4()}'
+    sha1_hash = sha1(namespace.encode('utf-8')).hexdigest()
+    sha512_hash = sha512(namespace.encode('utf-8')).hexdigest()
+    # return a dictionary containing both hash values
+    return {'sha1': sha1_hash, 'sha512': sha512_hash}
+
 
 def document_to_json(SPDX_document: Document) -> str:
     out_buffer = StringIO()
@@ -80,7 +87,7 @@ def format_dependencies(cls, dependencies: List[ExtractedDependency]):
     @classmethod
     def format_report(cls, report: DocumentReport):
         SPDX_document = create_base_spdx_document('LogFileSource')
-        SPDX_document.package = Package(name=SPDX_document.name,spdx_id=SPDX_document.spdx_id)
+        SPDX_document.package = Package(name=SPDX_document.name, spdx_id=SPDX_document.spdx_id)
         for finding in report.findings:
             finding_annotation = Annotation()
             finding_annotation.annotator = SPDX_TOOL
@@ -89,19 +96,29 @@ def format_report(cls, report: DocumentReport):
             finding_annotation.annotation_type = "OTHER"
             finding_annotation.comment = finding.json()
             SPDX_document.add_annotation(finding_annotation)
+
         dependent_documents = []
         for dependency in report.dependencies:
             dep_document = create_base_spdx_document(dependency.name)
-            dep_document.package = Package(name=dependency.name, spdx_id=dep_document.spdx_id, download_location=dependency.download_location, version=dependency.version)
+            dep_document.package = Package(name=dependency.name, spdx_id=dep_document.spdx_id,
+                                            download_location=dependency.download_location, version=dependency.version)
+            checksums = create_spdx_namespace(dependency.name)
+            # set SHA1 checksum
+            dep_document_checksum = Algorithm(identifier="SHA1", value=checksums['sha1'])
+            Algorithm(identifier="SHA-512", value=hashlib.sha512(cls.__TO_METHOD__(dep_document).encode()).hexdigest())
+            # set SHA512 checksum
+            dep_document_checksum.add_algorithm(Algorithm(identifier="SHA512", value=checksums['sha512']))
             SPDX_document.ext_document_references.append(
                 ExternalDocumentRef(
                     external_document_id=dep_document.spdx_id,
-                    check_sum=Algorithm(identifier="SHA1",value=sha1(cls.__TO_METHOD__(dep_document).encode()).hexdigest()),
+                    check_sum=dep_document_checksum,
                     spdx_document_uri=dep_document.namespace
-                    )
-                    )
+                )
+            )
             dependent_documents.append(dep_document)
+
         return (SPDX_document, dependent_documents)
+
         
 
 class SPDXJsonFormatter(SPDXBaseFormatter):
diff --git a/code/parsers/yum.py b/code/parsers/yum.py
index 5d97bc7..3a2befd 100644
--- a/code/parsers/yum.py
+++ b/code/parsers/yum.py
@@ -27,14 +27,15 @@ class YumParser(ParserBase):
     def on_load(self) -> None:
         self.yumblock_extractor_regex = re.compile(
             "^\W*=+$(\n|\r\n|\W)*Package(\n|\r\n|\W)+Arch(itecture)?(\n|\r\n|\W)+Version(\n|\r\n|\W)+Repository(\n|\r\n|\W)+Size(\n|\r\n|\W)^\W*=+$([\s\S]*?)Transaction Summary(\n|\r\n)^\W*=+$",
-            re.MULTILINE,
+            re.MULTILINE | re.IGNORECASE,
         )
         self.dependency_extractor_regex = re.compile(
             "( (?P<name>\S+)\s+(?P<arch>\S+)\s+(?P<version>\d\S+)\s+(?P<repo>\S+)\s+[\d\.]+ [kMGb])"
+            re.IGNORECASE,
         )
         self.fastest_mirror_block_detection = re.compile(
             "((Determining fastest mirrors|Loading mirror speeds from cached hostfile)(\n|\r\n)(\s\*\s.*(\n|\r\n))+)",
-            re.MULTILINE,
+            re.MULTILINE | re.IGNORECASE,
         )
         self.mirror_mapping_extraction = re.compile("\s\*\s(\w+):\s(\S+)")