diff --git a/relational-schemas.cabal b/relational-schemas.cabal
--- a/relational-schemas.cabal
+++ b/relational-schemas.cabal
@@ -1,5 +1,5 @@
 name:                relational-schemas
-version:             0.1.0.1
+version:             0.1.0.2
 synopsis:            RDBMSs' schema templates for relational-query
 description:         This package contains some RDBMSs' schema structure definitions.
                      Supported RDBMS schemas are below:
diff --git a/src/Database/Relational/Schema/SQLite3.hs b/src/Database/Relational/Schema/SQLite3.hs
--- a/src/Database/Relational/Schema/SQLite3.hs
+++ b/src/Database/Relational/Schema/SQLite3.hs
@@ -40,8 +40,8 @@
 notNull :: TableInfo -> Bool
 notNull info = isTrue . TableInfo.notnull $ info
   where
-    isTrue 1 = True
-    isTrue _ = False
+    isTrue 0 = False
+    isTrue _ = True
 
 getType :: Map String TypeQ -> TableInfo -> Maybe (String, TypeQ)
 getType mapFromSql info = do