diff --git a/lib/scientist/observation.rb b/lib/scientist/observation.rb
index da23708..327a39d 100644
--- a/lib/scientist/observation.rb
+++ b/lib/scientist/observation.rb
@@ -26,7 +26,7 @@ def initialize(name, experiment, &block)
 
     begin
       @value = block.call
-    rescue Object => e
+    rescue StandardError => e
       @exception = e
     end