diff --git a/pdfplumber/page.py b/pdfplumber/page.py
index 4ba2bdf..90c72cd 100644
--- a/pdfplumber/page.py
+++ b/pdfplumber/page.py
@@ -94,6 +94,7 @@ class Page(Container):
 
         NON_DECIMALIZE = [
             "fontname", "name", "upright",
+            "stroking_color", "non_stroking_color",
         ]
 
         def process_object(obj):
diff --git a/tests/pdfs/issue-53-example.pdf b/tests/pdfs/issue-53-example.pdf
new file mode 100644
index 0000000..dcd5cd3
Binary files /dev/null and b/tests/pdfs/issue-53-example.pdf differ
diff --git a/tests/test-issues.py b/tests/test-issues.py
index d94faa4..cf31bfc 100644
--- a/tests/test-issues.py
+++ b/tests/test-issues.py
@@ -91,3 +91,9 @@ class Test(unittest.TestCase):
         )
         assert len(pdf.metadata.keys())
         
+    def test_issue_53(self):
+        pdf = pdfplumber.from_path(
+            os.path.join(HERE, "pdfs/issue-53-example.pdf")
+        )
+        assert len(pdf.objects)
+