diff --git a/lib/vaporware/compiler/assembler.rb b/lib/vaporware/compiler/assembler.rb
index 253683f..fdd7c6e 100644
--- a/lib/vaporware/compiler/assembler.rb
+++ b/lib/vaporware/compiler/assembler.rb
@@ -28,7 +28,7 @@ def obj_file = @output
   def to_elf(input: @input, output: @output, debug: false)
     program_size = 0
     read(input:)
-    header = @elf_header.build
+    elf_header = @elf_header.build
 
     offset = 0
     section_headers = []
@@ -51,13 +51,13 @@ def to_elf(input: @input, output: @output, debug: false)
     f.path
   end
 
-  def read(input: @input)
+  def read(input: @input, text: @sections.text.body)
     read = { main: false }
     File.open(input, "r") do |r|
       r.each_line do |line|
         read[:main] = /main:/.match(line) unless read[:main]
         next unless read[:main] && !/main:/.match(line)
-        @sections.text.assemble!(line)
+        text.assemble!(line)
       end
     end
   end
diff --git a/sig/vaporware/compiler/assembler.rbs b/sig/vaporware/compiler/assembler.rbs
index d334898..fc2bc7a 100644
--- a/sig/vaporware/compiler/assembler.rbs
+++ b/sig/vaporware/compiler/assembler.rbs
@@ -3,12 +3,12 @@ class Vaporware::Compiler::Assembler
   @output: String
   @assembler: String
   @elf_header: Vaporware::Compiler::Assembler::ELF::Header
-  @sections: Hash[Symbol, Hash[Symbol, Object]]
+  @sections: Vaporware::Compiler::Assembler::ELF::Sections
   @debug: bool
 
   def initialize: (input: String, ?output: String, ?type: Symbol, ?debug: bool) -> void
   def assemble: (?assembler: String, ?assembler_options: Array[String] | [], ?input: String, ?output: String, ?debug: bool) -> String
   def obj_file: () -> String
-
-  private def to_elf: (?input: String, ?output: String, ?debug: bool) -> void
+  def to_elf: (?input: String, ?output: String, ?debug: bool) -> void
+  def read: (?input: String, ?text: Vaporware::Compiler::Assembler::ELF::Section::Text) -> void
 end
diff --git a/sig/vaporware/compiler/assembler/elf/header.rbs b/sig/vaporware/compiler/assembler/elf/header.rbs
index af8ceca..6580aef 100644
--- a/sig/vaporware/compiler/assembler/elf/header.rbs
+++ b/sig/vaporware/compiler/assembler/elf/header.rbs
@@ -19,7 +19,7 @@ class Vaporware::Compiler::Assembler::ELF::Header
 
   def initialize: (?endian: Symbol, ?type: Symbol, ?arche: Symbol) -> void
   def build: () -> String
-  def set!: (?entry: (nil | Integer), ?phoffset: (nil | Integer), ?shoffset: (nil | Integer), ?shnum: (nil | Integer), ?shstrndx: (nil | Integer)) -> void
+  def set!: (?entry: Integer?, ?phoffset: Integer?, ?shoffset: Integer?, ?shnum: Integer?, ?shstrndx: Integer?) -> void
 
   private
   def check: (Array[Integer] | Integer, Integer) -> bool