diff --git a/.github/workflows/.gitlint b/.github/workflows/.gitlint
index 510ff06..f42b01c 100644
--- a/.github/workflows/.gitlint
+++ b/.github/workflows/.gitlint
@@ -58,7 +58,7 @@ ignore=title-trailing-punctuation, T1, T2, T3, T4, T5, T6, T8, B1, B2, B3, B4, B
 # python-style regex that the commit-msg title must match
 # Note that the regex can contradict with other rules if not used correctly
 # (e.g. title-must-not-contain-word).
-regex=^(ci|feat|fix|docs|style|refactor|test|chore|perf)(\(.+\))?: .+
+regex=^(build|ci|feat|fix|docs|style|refactor|test|chore|perf)(\(.+\))?: .+
 
 # [body-max-line-length]
 # line-length=72
diff --git a/Makefile b/Makefile
index e8b1ba9..2d5538a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,10 @@
-REBAR := $(CURDIR)/rebar3
+REBAR := rebar3
 
 .PHONY: all
 all: es
 
-$(REBAR):
-	@curl -k -f -L "https://github.com/emqx/rebar3/releases/download/3.19.0-emqx-6/rebar3" -o ./rebar3
-	@chmod +x ./rebar3
-
 .PHONY: compile
-compile: $(REBAR)
+compile:
 	$(REBAR) compile
 
 .PHONY: clean
@@ -16,7 +12,7 @@ clean: distclean
 
 .PHONY: distclean
 distclean:
-	@rm -rf rebar3 _build erl_crash.dump rebar3.crashdump src/hocon_parser.erl src/hocon_scanner.erl
+	@rm -rf _build erl_crash.dump rebar3.crashdump src/hocon_parser.erl src/hocon_scanner.erl
 
 .PHONY: xref
 xref:
@@ -40,7 +36,7 @@ dialyzer: compile
 
 .PHONY: es
 es: export HOCON_ESCRIPT = true
-es: $(REBAR)
+es:
 	$(REBAR) as es escriptize
 
 .PHONY: elvis
@@ -49,9 +45,9 @@ elvis:
 
 .PHONY: fmt erlfmt
 fmt: erlfmt
-erlfmt: $(REBAR)
+erlfmt:
 	$(REBAR) fmt -w
 
 .PHONY: erlfmt-check
-erlfmt-check: $(REBAR)
+erlfmt-check:
 	$(REBAR) fmt -c
diff --git a/src/hocon_maps.erl b/src/hocon_maps.erl
index acae809..2322c91 100644
--- a/src/hocon_maps.erl
+++ b/src/hocon_maps.erl
@@ -132,14 +132,17 @@ get(Path, Config, Default) ->
         V -> V
     end.
 
-%% @doc get a child node from richmap, return value also a richmap.
-%% `undefined' is returned if no value path.
-%% Key (first arg) can be "foo.bar.baz" or ["foo.bar", "baz"] or ["foo", "bar", "baz"].
--spec deep_get(name() | [name()], config()) -> config() | undefined.
+%% @doc Get a child node from richmap, return value may also be a richmap.
+%% `undefined' is returned if no value found for the path.
+%% `Path' can be `"foo.bar.baz"', `["foo.bar", "baz"]' or `["foo", "bar", "baz"]'.
+-spec deep_get(name() | [name()], config()) -> term().
 deep_get(Path, Conf) ->
     deep_get(Path, Conf, richmap).
 
--spec deep_get(name() | [name()], config(), richmap | map) -> config() | undefined.
+%% @doc Get a child node from map | richmap, return value may also be a map | richmap.
+%% `undefined' is returned if no value found for the path.
+%% `Path' can be `"foo.bar.baz"', `["foo.bar", "baz"]' or `["foo", "bar", "baz"]'.
+-spec deep_get(name() | [name()], config(), richmap | map) -> term().
 deep_get(Path, Conf, Format) ->
     do_get(hocon_util:split_path(Path), Conf, Format).