diff --git a/src/sources/mssql/mssql-cast-rules.lisp b/src/sources/mssql/mssql-cast-rules.lisp
index 176f2ef..1de799e 100644
--- a/src/sources/mssql/mssql-cast-rules.lisp
+++ b/src/sources/mssql/mssql-cast-rules.lisp
@@ -15,6 +15,11 @@
     (:source (:type "int" :auto-increment t)
              :target (:type "bigserial" :drop-default t))
 
+    (:source (:type "tinyint") :target (:type "smallint"))
+
+    (:source (:type "tinyint" :auto-increment t)
+             :target (:type "serial"))
+
     (:source (:type "bit") :target (:type "boolean")
              :using pgloader.transforms::sql-server-bit-to-boolean)
 
@@ -27,8 +32,6 @@
     (:source (:type "geography") :target (:type "bytea")
          :using pgloader.transforms::byte-vector-to-bytea)
 
-    (:source (:type "tinyint") :target (:type "smallint"))
-
     (:source (:type "float") :target (:type "float")
              :using pgloader.transforms::float-to-string)