diff --git a/jmbitcoin/jmbitcoin/bip21.py b/jmbitcoin/jmbitcoin/bip21.py
index 8d410ac..72b38b0 100644
--- a/jmbitcoin/jmbitcoin/bip21.py
+++ b/jmbitcoin/jmbitcoin/bip21.py
@@ -11,7 +11,7 @@ import re
 
 def is_bip21_uri(uri):
     parsed = urlparse(uri)
-    return parsed.scheme == 'bitcoin' and parsed.path != ''
+    return parsed.scheme.lower() == 'bitcoin' and parsed.path != ''
 
 
 def is_bip21_amount_str(amount):
diff --git a/jmbitcoin/test/test_bip21.py b/jmbitcoin/test/test_bip21.py
index 1e9ae91..711b219 100644
--- a/jmbitcoin/test/test_bip21.py
+++ b/jmbitcoin/test/test_bip21.py
@@ -26,6 +26,10 @@ def test_bip21_decode():
 
     assert(btc.decode_bip21_uri('bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W'
         )['address'] == '175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W')
+    assert(btc.decode_bip21_uri('BITCOIN:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W'
+        )['address'] == '175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W')
+    assert(btc.decode_bip21_uri('BitCoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W'
+        )['address'] == '175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W')
 
     parsed = btc.decode_bip21_uri(
         'bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?label=Luke-Jr')