diff --git a/lib/delhivery/services/package_service.rb b/lib/delhivery/services/package_service.rb
index 46b392b..8cb8db0 100644
--- a/lib/delhivery/services/package_service.rb
+++ b/lib/delhivery/services/package_service.rb
@@ -19,7 +19,7 @@ def edit(params)
       end
 
       def cancel(*waybill_numbers)
-        connection.post(edit_path, {waybill: waybill_numbers.join(','), cancellation: true})
+        connection.post(edit_path, {waybill: waybill_numbers.join(','), cancellation: "true"})
       end
 
       private
@@ -32,7 +32,7 @@ def track_path
       end
 
       def edit_path
-        "/api/p/edit/"
+        "/api/p/edit"
       end
     end
   end
diff --git a/lib/delhivery/version.rb b/lib/delhivery/version.rb
index 27cdb4d..a6278c6 100644
--- a/lib/delhivery/version.rb
+++ b/lib/delhivery/version.rb
@@ -1,3 +1,3 @@
 module Delhivery
-  VERSION = "0.1.0"
+  VERSION = "0.1.1"
 end