diff --git a/src/_packagedcode/pypi.py b/src/_packagedcode/pypi.py
index 2eb78ce8..7d26be3e 100644
--- a/src/_packagedcode/pypi.py
+++ b/src/_packagedcode/pypi.py
@@ -828,8 +828,14 @@ def get_requirements_txt_dependencies(location, include_nested=False):
     # for now we ignore errors
     extra_data = {}
     for opt in req_file.options:
-        extra_data.update(opt.options)
-
+        for name, value in opt.options.items():
+            if name not in extra_data:
+                extra_data[name] = value
+            else:
+                if isinstance(value, list):
+                    extra_data[name].extend(value)
+                else:
+                    extra_data[name] = value    
     dependent_packages = []
     for req in req_file.requirements:
 
diff --git a/src/python_inspector/dependencies.py b/src/python_inspector/dependencies.py
index e11b8801..afa0816f 100644
--- a/src/python_inspector/dependencies.py
+++ b/src/python_inspector/dependencies.py
@@ -38,6 +38,15 @@ def get_dependencies_from_requirements(requirements_file="requirements.txt", *ar
             yield dependent_package
 
 
+def get_extra_data_from_requirements(requirements_file="requirements.txt", *args, **kwargs):
+    """
+    Yield extra_data for each requirement in a `requirement`
+    file.
+    """
+    for package_data in PipRequirementsFileHandler.parse(location=requirements_file):
+        yield package_data.extra_data
+
+
 def get_dependency(specifier, *args, **kwargs):
     """
     Return a DependentPackage given a requirement ``specifier`` string.
diff --git a/src/python_inspector/resolve_cli.py b/src/python_inspector/resolve_cli.py
index bf6dd7eb..a838c0ef 100644
--- a/src/python_inspector/resolve_cli.py
+++ b/src/python_inspector/resolve_cli.py
@@ -146,6 +146,8 @@ def resolve_dependencies(
 
     for req_file in requirement_files:
         deps = dependencies.get_dependencies_from_requirements(requirements_file=req_file)
+        for extra_data in dependencies.get_extra_data_from_requirements(requirements_file=req_file):
+            index_urls = (*index_urls, *tuple(extra_data.get("extra_index_urls") or []))
         direct_dependencies.extend(deps)
 
     for specifier in specifiers:
diff --git a/tests/data/requirements-test.txt b/tests/data/requirements-test.txt
new file mode 100644
index 00000000..0158655f
--- /dev/null
+++ b/tests/data/requirements-test.txt
@@ -0,0 +1,4 @@
+attrs
+--extra-index-url https://pypi.python.org/simple/
+--extra-index-url https://testpypi.python.org/simple/
+--extra-index-url https://pypi1.python.org/simple/
\ No newline at end of file
diff --git a/tests/test_requirement_parsing.py b/tests/test_requirement_parsing.py
new file mode 100644
index 00000000..b5b7cb51
--- /dev/null
+++ b/tests/test_requirement_parsing.py
@@ -0,0 +1,20 @@
+import os
+
+from python_inspector.dependencies import get_extra_data_from_requirements
+
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+REQ_FILE = os.path.join(BASE_DIR, "data", "requirements-test.txt")
+
+
+def test_get_extra_data_from_requirements():
+    expected = [
+        {
+            "extra_index_urls": [
+                "https://pypi.python.org/simple/",
+                "https://testpypi.python.org/simple/",
+                "https://pypi1.python.org/simple/",
+            ]
+        }
+    ]
+    result = list(get_extra_data_from_requirements(REQ_FILE))
+    assert expected == result