diff --git a/copyvios/checker.py b/copyvios/checker.py
index 91452d9..5940b65 100644
--- a/copyvios/checker.py
+++ b/copyvios/checker.py
@@ -123,12 +123,12 @@ def _get_cached_results(page, conn, mode):
 
     with conn.cursor() as cursor:
         cursor.execute(query1)
-        cursor.execute(query2, (cache_id,))
+        cursor.execute(query2, (buffer(cache_id),))
         results = cursor.fetchall()
         if not results:
             return None
         cache_time, queries, check_time = results[0]
-        cursor.execute(query3, (cache_id,))
+        cursor.execute(query3, (buffer(cache_id),))
         data = cursor.fetchall()
 
     if not data:  # TODO: do something less hacky for this edge case
@@ -171,11 +171,11 @@ def _cache_result(page, result, conn, mode):
     query2 = "INSERT INTO cache VALUES (?, DEFAULT, ?, ?)"
     query3 = "INSERT INTO cache_data VALUES (DEFAULT, ?, ?, ?, ?)"
     cache_id = sha256(mode + page.get().encode("utf8")).digest()
-    data = [(cache_id, source.url, source.confidence, source.skipped)
+    data = [(buffer(cache_id), source.url, source.confidence, source.skipped)
             for source in result.sources]
     with conn.cursor() as cursor:
         cursor.execute("START TRANSACTION")
-        cursor.execute(query1, (cache_id,))
-        cursor.execute(query2, (cache_id, result.queries, result.time))
+        cursor.execute(query1, (buffer(cache_id),))
+        cursor.execute(query2, (buffer(cache_id), result.queries, result.time))
         cursor.executemany(query3, data)
         cursor.execute("COMMIT")