diff --git a/src/Content/ContentManager.py b/src/Content/ContentManager.py
index 7ef7e54e..81b5c0e1 100644
--- a/src/Content/ContentManager.py
+++ b/src/Content/ContentManager.py
@@ -936,10 +936,13 @@ class ContentManager(object):
                 if type(file) is dict:
                     new_content = file
                 else:
-                    if sys.version_info.major == 3 and sys.version_info.minor < 6:
-                        new_content = json.loads(file.read().decode("utf8"))
-                    else:
-                        new_content = json.load(file)
+                    try:
+                        if sys.version_info.major == 3 and sys.version_info.minor < 6:
+                            new_content = json.loads(file.read().decode("utf8"))
+                        else:
+                            new_content = json.load(file)
+                    except Exception as err:
+                        raise VerifyError("Invalid json file: %s" % err)
                 if inner_path in self.contents:
                     old_content = self.contents.get(inner_path, {"modified": 0})
                     # Checks if its newer the ours