diff --git a/plantuml-mode.el b/plantuml-mode.el
index 315bd1f..dbe2e0d 100644
--- a/plantuml-mode.el
+++ b/plantuml-mode.el
@@ -84,8 +84,8 @@
 ;;; syntax table
 (defvar plantuml-mode-syntax-table
   (let ((synTable (make-syntax-table)))
-    (modify-syntax-entry ?\/  ". 41"    synTable)
-    (modify-syntax-entry ?'   "! 23b"    synTable)
+    (modify-syntax-entry ?\/  ". 14c"   synTable)
+    (modify-syntax-entry ?'   "< 23"    synTable)
     (modify-syntax-entry ?\n  ">"       synTable)
     (modify-syntax-entry ?\r  ">"       synTable)
     (modify-syntax-entry ?!   "w"       synTable)