diff --git a/Makefile b/Makefile
index e7775a9..c22df54 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 SOURCES = $(shell find . -name '*.go')
-PARSERS = $(shell find . -name '*.parser')
+PARSERS = $(shell find . -name '*.treerack')
 
 default: build
 
diff --git a/README.md b/README.md
index 0de1f9b..cd1118f 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,6 @@
 
 ### Examples
 
-- JSON: https://github.com/aryszka/treerack/blob/master/json.parser
-- Scheme: https://github.com/aryszka/treerack/blob/master/scheme.parser
-- Treerack (itself): https://github.com/aryszka/treerack/blob/master/syntax.parser
+- JSON: https://github.com/aryszka/treerack/blob/master/json.treerack
+- Scheme: https://github.com/aryszka/treerack/blob/master/scheme.treerack
+- Treerack (itself): https://github.com/aryszka/treerack/blob/master/treerack.treerack
diff --git a/boot.go b/boot.go
index 341a2b6..0f5c932 100644
--- a/boot.go
+++ b/boot.go
@@ -211,7 +211,7 @@ func bootSyntax() (*Syntax, error) {
 		return nil, err
 	}
 
-	f, err := os.Open("syntax.parser")
+	f, err := os.Open("treerack.treerack")
 	if err != nil {
 		return nil, err
 	}
diff --git a/boot_test.go b/boot_test.go
index 6ab8ac4..eab4746 100644
--- a/boot_test.go
+++ b/boot_test.go
@@ -51,7 +51,7 @@ func TestBoot(t *testing.T) {
 		return
 	}
 
-	f, err := os.Open("syntax.parser")
+	f, err := os.Open("treerack.treerack")
 	if err != nil {
 		t.Error(err)
 		return
diff --git a/eskip.parser b/eskip.treerack
similarity index 100%
rename from eskip.parser
rename to eskip.treerack
diff --git a/eskip_test.go b/eskip_test.go
index c75de5b..0b65306 100644
--- a/eskip_test.go
+++ b/eskip_test.go
@@ -726,7 +726,7 @@ func TestEskip(t *testing.T) {
 	e := eskip.Print(true, r...)
 	b := bytes.NewBufferString(e)
 
-	s, err := openSyntaxFile("eskip.parser")
+	s, err := openSyntaxFile("eskip.treerack")
 	if err != nil {
 		t.Error(err)
 		return
diff --git a/json.parser b/json.treerack
similarity index 100%
rename from json.parser
rename to json.treerack
diff --git a/json_test.go b/json_test.go
index dee00e6..a1727f2 100644
--- a/json_test.go
+++ b/json_test.go
@@ -285,7 +285,7 @@ func jsonTreeToJSON(n *Node) (interface{}, error) {
 }
 
 func TestJSON(t *testing.T) {
-	runTestsFile(t, "json.parser", []testItem{{
+	runTestsFile(t, "json.treerack", []testItem{{
 		title: "true",
 		text:  "true",
 		node: &Node{
@@ -509,7 +509,7 @@ func TestRandomJSON(t *testing.T) {
 
 	buf := bytes.NewBuffer(b)
 
-	s, err := openSyntaxFile("json.parser")
+	s, err := openSyntaxFile("json.treerack")
 	if err != nil {
 		t.Error(err)
 		return
diff --git a/keyval.parser b/keyval.treerack
similarity index 100%
rename from keyval.parser
rename to keyval.treerack
diff --git a/keyval_test.go b/keyval_test.go
index 02d5465..656e3d8 100644
--- a/keyval_test.go
+++ b/keyval_test.go
@@ -3,7 +3,7 @@ package treerack
 import "testing"
 
 func TestKeyVal(t *testing.T) {
-	runTestsFile(t, "keyval.parser", []testItem{{
+	runTestsFile(t, "keyval.treerack", []testItem{{
 		title: "empty",
 	}, {
 		title: "a comment",
diff --git a/mml.parser b/mml.treerack
similarity index 100%
rename from mml.parser
rename to mml.treerack
diff --git a/mml_test.go b/mml_test.go
index b83d36d..c63a74d 100644
--- a/mml_test.go
+++ b/mml_test.go
@@ -9,7 +9,7 @@ import (
 )
 
 func TestMML(t *testing.T) {
-	s, err := openSyntaxFile("mml.parser")
+	s, err := openSyntaxFile("mml.treerack")
 	if err != nil {
 		t.Error(err)
 		return
@@ -2969,7 +2969,7 @@ func TestMMLFile(t *testing.T) {
 
 	const n = 180
 
-	s, err := openSyntaxFile("mml.parser")
+	s, err := openSyntaxFile("mml.treerack")
 	if err != nil {
 		t.Error(err)
 		return
diff --git a/scheme.parser b/scheme.treerack
similarity index 100%
rename from scheme.parser
rename to scheme.treerack
diff --git a/scheme_test.go b/scheme_test.go
index 7b87898..e67fa9d 100644
--- a/scheme_test.go
+++ b/scheme_test.go
@@ -3,7 +3,7 @@ package treerack
 import "testing"
 
 func TestScheme(t *testing.T) {
-	runTestsFile(t, "scheme.parser", []testItem{{
+	runTestsFile(t, "scheme.treerack", []testItem{{
 		title: "empty",
 	}, {
 		title: "a function",
diff --git a/sexpr.parser b/sexpr.treerack
similarity index 100%
rename from sexpr.parser
rename to sexpr.treerack
diff --git a/sexpr_test.go b/sexpr_test.go
index d907c6a..6806728 100644
--- a/sexpr_test.go
+++ b/sexpr_test.go
@@ -3,7 +3,7 @@ package treerack
 import "testing"
 
 func TestSExpr(t *testing.T) {
-	runTestsFile(t, "sexpr.parser", []testItem{{
+	runTestsFile(t, "sexpr.treerack", []testItem{{
 		title: "number",
 		text:  "42",
 		nodes: []*Node{{
diff --git a/syntax.parser b/treerack.treerack
similarity index 100%
rename from syntax.parser
rename to treerack.treerack