diff --git a/resources/misc/db_init_mysql.sql b/resources/misc/db_init_mysql.sql
index bb523b13b..ce4210098 100644
--- a/resources/misc/db_init_mysql.sql
+++ b/resources/misc/db_init_mysql.sql
@@ -65,8 +65,8 @@ CREATE TABLE IF NOT EXISTS Messages (
   is_important    INTEGER(1)  NOT NULL DEFAULT 0 CHECK (is_important >= 0 AND is_important <= 1),
   feed            INTEGER     NOT NULL,
   title           TEXT        NOT NULL CHECK (title != ''),
-  url             TEXT,
-  author          TEXT,
+  url             TEXT        NOT NULL,
+  author          TEXT        NOT NULL,
   date_created    BIGINT      NOT NULL CHECK (date_created != 0),
   contents        TEXT,
   
diff --git a/resources/misc/db_init_sqlite.sql b/resources/misc/db_init_sqlite.sql
index 778fe3006..4de776260 100644
--- a/resources/misc/db_init_sqlite.sql
+++ b/resources/misc/db_init_sqlite.sql
@@ -59,8 +59,8 @@ CREATE TABLE IF NOT EXISTS Messages (
   is_important    INTEGER(1)  NOT NULL CHECK (is_important >= 0 AND is_important <= 1) DEFAULT (0),
   feed            INTEGER     NOT NULL,
   title           TEXT        NOT NULL CHECK (title != ''),
-  url             TEXT,
-  author          TEXT,
+  url             TEXT        NOT NULL,
+  author          TEXT        NOT NULL,
   date_created    INTEGER     NOT NULL CHECK (date_created != 0),
   contents        TEXT,
   
diff --git a/resources/misc/db_init_sqlite_memory.sql b/resources/misc/db_init_sqlite_memory.sql
index 0e2d3233e..bc1024c5b 100644
--- a/resources/misc/db_init_sqlite_memory.sql
+++ b/resources/misc/db_init_sqlite_memory.sql
@@ -59,8 +59,8 @@ CREATE TABLE IF NOT EXISTS Messages (
   is_important    INTEGER(1)  NOT NULL CHECK (is_important >= 0 AND is_important <= 1) DEFAULT (0),
   feed            INTEGER     NOT NULL,
   title           TEXT        NOT NULL CHECK (title != ''),
-  url             TEXT,
-  author          TEXT,
+  url             TEXT        NOT NULL,
+  author          TEXT        NOT NULL,
   date_created    INTEGER     NOT NULL CHECK (date_created != 0),
   contents        TEXT,