diff --git a/pkginfo/Scripts/postinstall b/pkginfo/Scripts/postinstall
index 44b9a22..6f7dfce 100755
--- a/pkginfo/Scripts/postinstall
+++ b/pkginfo/Scripts/postinstall
@@ -13,15 +13,16 @@ for f in \
     chown -Rh root:wheel "$f"
 done
 
-# ------------------------------------------------------------
-# load kext
-sh "/Library/Application Support/org.pqrs/Seil/startup.sh" start
-
 # ------------------------------------------------------------
 # relaunch Seil.app
 
 /Applications/Seil.app/Contents/Library/bin/seil \
     relaunch
 
+# ------------------------------------------------------------
+# load kext
+# (We have to load kext after relaunch Seil.app to avoid "kext version mismatched alert".)
+sh "/Library/Application Support/org.pqrs/Seil/startup.sh" start
+
 # ------------------------------------------------------------
 exit 0