diff --git a/sleepy/main.py b/sleepy/main.py
index e39d3cb..69a22cf 100644
--- a/sleepy/main.py
+++ b/sleepy/main.py
@@ -1,6 +1,6 @@
 from sleepy.asmik import asmik_emit
 from sleepy.interpreter import AsmikInterpreter
-from sleepy.syntax import LarkParser, Syntax2Program
+from sleepy.syntax import LarkParser, to_program
 from sleepy.tafka import TafkaUnit
 
 
@@ -17,7 +17,7 @@ def main() -> None:
 
     parser = LarkParser()
     syntax = parser.parse_program(source)
-    program = Syntax2Program.converted(syntax)
+    program = to_program(syntax)
     tafka = TafkaUnit.emitted_from(program)
     asmik = asmik_emit(tafka)
 
diff --git a/sleepy/syntax/__init__.py b/sleepy/syntax/__init__.py
index 11cadc6..2d16159 100644
--- a/sleepy/syntax/__init__.py
+++ b/sleepy/syntax/__init__.py
@@ -1,7 +1,7 @@
 from .exception import ParsingError
 from .lark import LarkParser
 from .parser import SleepyParser
-from .s2p import Syntax2Program
+from .s2p import to_program
 from .tree import (
     Application,
     Args,
diff --git a/sleepy/syntax/s2p.py b/sleepy/syntax/s2p.py
index f40056a..94849b8 100644
--- a/sleepy/syntax/s2p.py
+++ b/sleepy/syntax/s2p.py
@@ -30,12 +30,8 @@
 from .visitor import Visitor
 
 
-class Syntax2Program(Visitor[ProgramNode]):
-    def __init__(
-        self,
-        namespace: Namespace,
-        bindings: Bindings,
-    ) -> None:
+class S2PVisitor(Visitor[ProgramNode]):
+    def __init__(self, namespace: Namespace, bindings: Bindings) -> None:
         self.namespace = namespace
         self.bindings = bindings
 
@@ -124,19 +120,16 @@ def visit_definition(
         return Definition(symbol, expression)
 
     @override
-    def visit_expression(
-        self,
-        expression: ExpressionAST,
-    ) -> Expression:
+    def visit_expression(self, expression: ExpressionAST) -> Expression:
         return cast(Expression, super().visit_expression(expression))
 
-    @classmethod
-    def converted(cls, tree: ProgramAST) -> ProgramUnit:
-        builtin = BuiltinLayer()
-        s2p = Syntax2Program(builtin.namespace, builtin.bindings)
-        program = s2p.visit_program(tree)
-        return ProgramUnit(
-            program=program,
-            bindings=s2p.bindings,
-            root=builtin.namespace,
-        )
+
+def to_program(tree: ProgramAST) -> ProgramUnit:
+    builtin = BuiltinLayer()
+    s2p = S2PVisitor(builtin.namespace, builtin.bindings)
+    program = s2p.visit_program(tree)
+    return ProgramUnit(
+        program=program,
+        bindings=s2p.bindings,
+        root=builtin.namespace,
+    )
diff --git a/test/asmik/evaluate.py b/test/asmik/evaluate.py
index bbc71f2..6f58750 100644
--- a/test/asmik/evaluate.py
+++ b/test/asmik/evaluate.py
@@ -2,13 +2,13 @@
 
 from sleepy.asmik import asmik_emit
 from sleepy.interpreter import AsmikInterpreter
-from sleepy.syntax import Syntax2Program
+from sleepy.syntax import to_program
 from sleepy.tafka import TafkaUnit
 
 
 def evaluate(source: str) -> str:
     syntax = parser.parse_program(source)
-    program = Syntax2Program.converted(syntax)
+    program = to_program(syntax)
     tafka = TafkaUnit.emitted_from(program)
     asmik = asmik_emit(tafka)
 
diff --git a/test/program/parse.py b/test/program/parse.py
index b58add9..707f2ac 100644
--- a/test/program/parse.py
+++ b/test/program/parse.py
@@ -1,8 +1,8 @@
 from test.common import parser
 
 from sleepy.program import ProgramUnit
-from sleepy.syntax import Syntax2Program
+from sleepy.syntax import to_program
 
 
 def parse(source: str) -> ProgramUnit:
-    return Syntax2Program.converted(parser.parse_program(source))
+    return to_program(parser.parse_program(source))