diff --git a/README.md b/README.md
index f8005c2..40a95a3 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ The following elements are always returned by the scraper class:
     filing_date               (str)   : filing date
     priority_date             (str)   : priority date
     grant_date                (str)   : grant date
+    expiration_date           (str)   : expiration date
     forward_cites_no_family   (json)  : forward citations that are not family-to-family cites
     forward_cites_yes_family  (json)  : forward citations that are family-to-family cites
     backward_cites_no_family  (json)  : backward citations that are not family-to-family cites
diff --git a/google_patent_scraper/main.py b/google_patent_scraper/main.py
index 77b161a..60f5dcb 100644
--- a/google_patent_scraper/main.py
+++ b/google_patent_scraper/main.py
@@ -168,6 +168,7 @@ def process_patent_html(self,soup):
             - filing_date               (str)   : filing date
             - priority_date             (str)   : priority date
             - grant_date                (str)   : grant date
+            - expiration_date           (str)   : expiration date
             - forward_cites_no_family   (json)  : forward citations that are not family-to-family cites
             - forward_cites_yes_family  (json)  : forward citations that are family-to-family cites
             - backward_cites_no_family  (json)  : backward citations that are not family-to-family cites