diff --git a/ChangeLog.md b/ChangeLog.md
index a7b2d79c31..441752288e 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,4 +1,6 @@
 ## Client Versions ##
+* v9.50.0 (2014-03-18)
+	* hotfix: global integer overflow
 * v9.49.4 (2014-02-05)
 	* reconceived this package as a libary
 	* moved CLI to new repository: `counterparty-cli`
diff --git a/counterpartylib/lib/check.py b/counterpartylib/lib/check.py
index 260912902b..88eb58efdf 100644
--- a/counterpartylib/lib/check.py
+++ b/counterpartylib/lib/check.py
@@ -128,11 +128,11 @@ def software_version():
     logger.debug('Checking version.')
 
     try:
-        host = 'https://counterpartyxcp.github.io/counterparty-lib/protocol_changes.json'
+        host = 'https://counterpartyxcp.github.io/counterparty-lib/counterpartylib/protocol_changes.json'
         response = requests.get(host, headers={'cache-control': 'no-cache'})
         # TODO: Temporary
         if response.status_code != 200:
-            host = 'https://counterpartyxcp.github.io/counterpartyd/protocol_changes.json'  # Old Location
+            host = 'https://counterpartyxcp.github.io/counterpartyd/counterpartylib/protocol_changes.json'  # Old Location
             response = requests.get(host, headers={'cache-control': 'no-cache'})
         versions = json.loads(response.text)
     except (requests.exceptions.ConnectionError, ConnectionRefusedError, ValueError):
diff --git a/counterpartylib/lib/config.py b/counterpartylib/lib/config.py
index 55a58dc337..b912b7f86a 100644
--- a/counterpartylib/lib/config.py
+++ b/counterpartylib/lib/config.py
@@ -6,8 +6,8 @@
 
 # Versions
 VERSION_MAJOR = 9
-VERSION_MINOR = 49
-VERSION_REVISION = 4
+VERSION_MINOR = 50
+VERSION_REVISION = 0
 VERSION_STRING = str(VERSION_MAJOR) + '.' + str(VERSION_MINOR) + '.' + str(VERSION_REVISION)
 
 
diff --git a/counterpartylib/lib/messages/versions/send1.py b/counterpartylib/lib/messages/versions/send1.py
index b671701893..5be6f83f43 100644
--- a/counterpartylib/lib/messages/versions/send1.py
+++ b/counterpartylib/lib/messages/versions/send1.py
@@ -97,9 +97,11 @@ def parse (db, tx, message):
         elif balances[0]['quantity'] < quantity:
             quantity = min(balances[0]['quantity'], quantity)
 
-    if status == 'valid':
-        # For SQLite3
+    # For SQLite3
+    if quantity:
         quantity = min(quantity, config.MAX_INT)
+
+    if status == 'valid':
         problems = validate(db, tx['source'], tx['destination'], asset, quantity, tx['block_index'])
         if problems: status = 'invalid: ' + '; '.join(problems)
 
diff --git a/counterpartylib/protocol_changes.json b/counterpartylib/protocol_changes.json
index 20dff2a8f6..d6b0300a55 100644
--- a/counterpartylib/protocol_changes.json
+++ b/counterpartylib/protocol_changes.json
@@ -34,5 +34,12 @@
 			"minimum_version_minor": 49,
 			"minimum_version_revision": 0,
 			"block_index": 334000
+		},
+	"hotfix_integer_overflow":      {
+			"minimum_version_major": 9,
+			"minimum_version_minor": 50,
+			"minimum_version_revision": 0,
+			"block_index": 0
 		}
+
 }
diff --git a/protocol_changes.json b/protocol_changes.json
deleted file mode 100644
index f49894c74b..0000000000
--- a/protocol_changes.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-	"numeric_asset_names":	{
-			"minimum_version_major": 9,
-			"minimum_version_minor": 47,
-			"minimum_version_revision": 1,
-			"block_index": 333500
-		},
-	"multisig_addresses":	{
-			"minimum_version_major": 9,
-			"minimum_version_minor": 47,
-			"minimum_version_revision": 1,
-			"block_index": 333500
-		},
-	"send_destination_required":	{
-			"minimum_version_major": 9,
-			"minimum_version_minor": 47,
-			"minimum_version_revision": 1,
-			"block_index": 333500
-		},
-	"contracts_only_xcp_balances":	{
-			"minimum_version_major": 9,
-			"minimum_version_minor": 47,
-			"minimum_version_revision": 1,
-			"block_index": 333500
-		},
-	"better_single_source_destination":      {
-			"minimum_version_major": 9,
-			"minimum_version_minor": 48,
-			"minimum_version_revision": 0,
-			"block_index": 335000
-		},
-	"hotfix_numeric_assets":      {
-			"minimum_version_major": 9,
-			"minimum_version_minor": 49,
-			"minimum_version_revision": 0,
-			"block_index": 334000
-		}
-}
-
diff --git a/setup.py b/setup.py
index 5fc371f06a..82a56719cd 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,9 @@
 import sys
 import shutil
 
-CURRENT_VERSION = '9.49.4'
+from counterpartylib.lib import config
+
+CURRENT_VERSION = config.VERSION_STRING
 
 # NOTE: Why we don’t use the the PyPi package:
 # <https://code.google.com/p/apsw/source/detail?r=358a9623d051>
@@ -98,7 +100,6 @@ def finalize_options(self):
 
     def run(self):
         import appdirs
-        from counterpartylib.lib import config
 
         old_data_dir = appdirs.user_config_dir(appauthor='Counterparty', appname='counterpartyd', roaming=True)
         old_database = os.path.join(old_data_dir, 'counterpartyd.9.db')
diff --git a/version.json b/version.json
deleted file mode 100644
index d10c958d40..0000000000
--- a/version.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-	"minimum_version_major": 9,
-	"minimum_version_minor": 49,
-	"minimum_version_revision": 0,
-	"reason": "hotfix: numeric asset names",
-	"block_index": 334000
-}