diff --git a/knex/index.d.ts b/knex/index.d.ts
index 0627498962..660a8dfcb2 100644
--- a/knex/index.d.ts
+++ b/knex/index.d.ts
@@ -165,7 +165,7 @@ declare namespace Knex {
 
     interface Join {
         (raw: Raw): QueryBuilder;
-        (tableName: string, columns: { [key: string]: string | Raw }): QueryBuilder;
+        (tableName: string, columns: { [key: string]: string | number | Raw }): QueryBuilder;
         (tableName: string, callback: Function): QueryBuilder;
         (tableName: TableName, raw: Raw): QueryBuilder;
         (tableName: TableName, column1: string, column2: string): QueryBuilder;
diff --git a/knex/knex-tests.ts b/knex/knex-tests.ts
index 420aafd724..3d02a7924b 100644
--- a/knex/knex-tests.ts
+++ b/knex/knex-tests.ts
@@ -188,6 +188,10 @@ knex('users')
   .join('contacts', 'users.id', '=', 'contacts.user_id')
   .select('users.id', 'contacts.phone');
 
+knex('users')
+  .join('contacts', { 'users.id': 12355 })
+  .select('users.id', 'contacts.phone');
+
 knex('users')
   .join('contacts', 'users.id', 'contacts.user_id')
   .select('users.id', 'contacts.phone');