diff --git a/CHANGELOG.md b/CHANGELOG.md
index 840e182..eccef63 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## 0.4.1
 - Enables the user to disable linting in the package settings
+- Fixes problem in highlighting of numerical constants
 
 ## 0.4.0
 - Combines the linter and syntax highlighting package (formerly https://github.com/jjdekker/linter-mzn). I'll look into the possibility of disabling the linter extension at a later stadium.
diff --git a/grammars/mzn.cson b/grammars/mzn.cson
index a26144e..25dea99 100644
--- a/grammars/mzn.cson
+++ b/grammars/mzn.cson
@@ -140,7 +140,7 @@
   }
 
   {
-    'match': '([+-]?)\\d+(\\.\\d*)?([eE][-+]?\\d+)?'
+    'match': '([+-]?)\\d+(\\.(?!\\.)\\d*)?([eE][-+]?\\d+)?'
     'name': 'constant.numeric.mzn'
   }
 ]