diff --git a/lib/woothee/os.py b/lib/woothee/os.py
index 0e382e0..cf5c130 100644
--- a/lib/woothee/os.py
+++ b/lib/woothee/os.py
@@ -129,6 +129,10 @@ def challenge_smartphone(ua, result):
         data = dataset.get('iPod')
     elif 'Android' in ua:
         data = dataset.get('Android')
+        regex = re.compile(r"Android[- ](\d+(?:\.\d+(?:\.\d+)?)?)")
+        m = regex.search(ua)
+        if m:
+            os_version = m.group(1)
     elif 'CFNetwork' in ua:
         data = dataset.get('iOS')
     elif 'BB10' in ua:
diff --git a/woothee b/woothee
index 7ea09a7..998c6ec 160000
--- a/woothee
+++ b/woothee
@@ -1 +1 @@
-Subproject commit 7ea09a7bd37572119174832881e0c2506cb41791
+Subproject commit 998c6ecd1c6b0df770210ba18ca55ee3600e5b80