diff --git a/ethcore/src/lib.rs b/ethcore/src/lib.rs
index 0b62ec4fb..f443647bd 100644
--- a/ethcore/src/lib.rs
+++ b/ethcore/src/lib.rs
@@ -27,6 +27,10 @@
 #![cfg_attr(feature="dev", allow(clone_on_copy))]
 // In most cases it expresses function flow better
 #![cfg_attr(feature="dev", allow(if_not_else))]
+// TODO [todr] a lot of warnings to be fixed
+#![cfg_attr(feature="dev", allow(needless_borrow))]
+#![cfg_attr(feature="dev", allow(assign_op_pattern))]
+
 
 //! Ethcore library
 //!
diff --git a/util/src/lib.rs b/util/src/lib.rs
index a97282198..a8f74b5a4 100644
--- a/util/src/lib.rs
+++ b/util/src/lib.rs
@@ -29,6 +29,10 @@
 #![cfg_attr(feature="dev", allow(clone_on_copy))]
 // In most cases it expresses function flow better
 #![cfg_attr(feature="dev", allow(if_not_else))]
+// TODO [todr] a lot of warnings to be fixed
+#![cfg_attr(feature="dev", allow(needless_borrow))]
+#![cfg_attr(feature="dev", allow(assign_op_pattern))]
+
 
 //! Ethcore-util library
 //!