diff --git a/camelot/parsers/stream.py b/camelot/parsers/stream.py
index 2fb7da3..f36fa40 100644
--- a/camelot/parsers/stream.py
+++ b/camelot/parsers/stream.py
@@ -287,6 +287,10 @@ class Stream(BaseParser):
                 hor_text = []
                 for region in self.table_regions:
                     x1, y1, x2, y2 = region.split(",")
+                    x1 = float(x1)
+                    y1 = float(y1)
+                    x2 = float(x2)
+                    y2 = float(y2)
                     region_text = text_in_bbox((x1, y2, x2, y1), self.horizontal_text)
                     hor_text.extend(region_text)
             # find tables based on nurminen's detection algorithm
diff --git a/tests/test_common.py b/tests/test_common.py
index c04a151..dc2f5af 100644
--- a/tests/test_common.py
+++ b/tests/test_common.py
@@ -69,6 +69,14 @@ def test_stream_two_tables():
     assert df2.equals(tables[1].df)
 
 
+def test_stream_table_regions():
+    df = pd.DataFrame(data_stream_table_areas)
+
+    filename = os.path.join(testdir, "tabula/us-007.pdf")
+    tables = camelot.read_pdf(filename, flavor="stream", table_areas=["320,460,573,335"])
+    assert df.equals(tables[0].df)
+
+
 def test_stream_table_areas():
     df = pd.DataFrame(data_stream_table_areas)