diff --git a/setup/migrate.py b/setup/migrate.py
index 1d5911ab..b10f085f 100755
--- a/setup/migrate.py
+++ b/setup/migrate.py
@@ -148,6 +148,40 @@ def migration_11(env):
 		# meh
 		pass
 
+def migration_12(env):
+	# Upgrading to Carddav Roundcube plugin to version 3+, it requires the carddav_*
+        # tables to be dropped.
+        # Checking that the roundcube database already exists.
+        if os.path.exists(os.path.join(env["STORAGE_ROOT"], "mail/roundcube/roundcube.sqlite")):
+            import sqlite3
+            conn = sqlite3.connect(os.path.join(env["STORAGE_ROOT"], "mail/roundcube/roundcube.sqlite"))
+            c = conn.cursor()
+            # Get a list of all the tables that begin with 'carddav_'
+            c.execute("SELECT name FROM sqlite_master WHERE type = ? AND name LIKE ?", ('table', 'carddav_%'))
+            carddav_tables = c.fetchall()
+            # If there were tables that begin with 'carddav_', drop them
+            if carddav_tables:
+                for table in carddav_tables:
+                    try:
+                        table = table[0]
+                        c = conn.cursor()
+                        dropcmd = "DROP TABLE %s" % table
+                        c.execute(dropcmd)
+                    except:
+                        print("Failed to drop table", table, e)
+            # Save.
+            conn.commit()
+            conn.close()
+
+            # Delete all sessions, requring users to login again to recreate carddav_*
+            # databases
+            conn = sqlite3.connect(os.path.join(env["STORAGE_ROOT"], "mail/roundcube/roundcube.sqlite"))
+            c = conn.cursor()
+            c.execute("delete from session;")
+            conn.commit()
+            conn.close()
+
+
 def get_current_migration():
 	ver = 0
 	while True:
diff --git a/setup/webmail.sh b/setup/webmail.sh
index 567a4f5a..cdf73cfb 100755
--- a/setup/webmail.sh
+++ b/setup/webmail.sh
@@ -39,8 +39,8 @@ VERSION=1.3.8
 HASH=90c7900ccf7b2f46fe49c650d5adb9b85ee9cc22
 PERSISTENT_LOGIN_VERSION=dc5ca3d3f4415cc41edb2fde533c8a8628a94c76
 HTML5_NOTIFIER_VERSION=4b370e3cd60dabd2f428a26f45b677ad1b7118d5
-CARDDAV_VERSION=2.0.4
-CARDDAV_HASH=d93f3cfb3038a519e71c7c3212c1d16f5da609a4
+CARDDAV_VERSION=3.0.3
+CARDDAV_HASH=d1e3b0d851ffa2c6bd42bf0c04f70d0e1d0d78f8
 
 UPDATE_KEY=$VERSION:$PERSISTENT_LOGIN_VERSION:$HTML5_NOTIFIER_VERSION:$CARDDAV_VERSION