diff --git a/NEWS.md b/NEWS.md
index f16bf93a..d8d525f3 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,7 +1,8 @@
 # blockr 0.0.2.9000
 
-## Breaking changes
-- Added new `category` to the registry. Now when a block is registered, you must pass a category parameter (which is used by the add block feature to sort blocks):
+## Feature
+- Improved __add__ new block.
+- Added new `category` to the registry. Now when a block is registered, you may pass a category parameter (which is used by the add block feature to sort blocks):
 
 ```r
 register_block(
@@ -13,13 +14,7 @@ register_block(
   input = "data.frame",
   output = "data.frame"
 )
-
-# Adding category to avoid 
-# error: argument "category" is missing, with no default
-```
-
-## Feature
-- Improved __add__ new block.
+If not passed, the block will belong to `uncategorized` blocks (default).
 
 ## Doc
 - Improved `registry` and `getting started` vignettes.
diff --git a/R/registry.R b/R/registry.R
index 5b70a599..964c55b5 100644
--- a/R/registry.R
+++ b/R/registry.R
@@ -69,7 +69,7 @@ block_registry <- new.env()
 #'
 #' @rdname available_blocks
 #' @export
-register_block <- function(constructor, name, description, category, classes, input,
+register_block <- function(constructor, name, description, category = "uncategorized", classes, input,
                            output, package = NA_character_) {
 
   descr <- new_block_descr(constructor, name, description, category, classes, input,
@@ -87,7 +87,7 @@ register_block <- function(constructor, name, description, category, classes, in
 #' @param ... Forwarded to `register_block()`
 #' @rdname available_blocks
 #' @export
-register_blocks <- function(constructor, name, description, category, classes, input,
+register_blocks <- function(constructor, name, description, category = "uncategorized", classes, input,
                             output, package = NA_character_) {
 
   if (length(constructor) == 1L && !is.list(classes)) {
diff --git a/man/available_blocks.Rd b/man/available_blocks.Rd
index 2a18a3b5..994daf85 100644
--- a/man/available_blocks.Rd
+++ b/man/available_blocks.Rd
@@ -20,7 +20,7 @@ register_block(
   constructor,
   name,
   description,
-  category,
+  category = NULL,
   classes,
   input,
   output,
@@ -31,7 +31,7 @@ register_blocks(
   constructor,
   name,
   description,
-  category,
+  category = NULL,
   classes,
   input,
   output,