diff --git a/src/compiler/ast.rs b/src/compiler/ast.rs
index 5246da8..38fafd6 100644
--- a/src/compiler/ast.rs
+++ b/src/compiler/ast.rs
@@ -4,17 +4,17 @@ use std::fmt;
 #[derive(Debug, PartialEq)]
 pub enum Expression<'source> {
     EmptyLiteral(CodeLocation),
-    IntLiteral(CodeLocation, u32),
+    IntLiteral(CodeLocation, i64),
     BoolLiteral(CodeLocation, bool),
     Identifier(CodeLocation, &'source str),
     UnaryOp(CodeLocation, &'source str, Box<Expression<'source>>),
-    VarDeclaration(CodeLocation, &'source str, Box<Expression<'source>>),
     BinaryOp(
         CodeLocation,
         Box<Expression<'source>>,
         &'source str,
         Box<Expression<'source>>,
     ),
+    VarDeclaration(CodeLocation, &'source str, Box<Expression<'source>>),
     Conditional(
         CodeLocation,
         Box<Expression<'source>>,
diff --git a/src/compiler/parser/mod.rs b/src/compiler/parser/mod.rs
index 4ad8163..c030dd9 100644
--- a/src/compiler/parser/mod.rs
+++ b/src/compiler/parser/mod.rs
@@ -260,7 +260,7 @@ fn parse_int_literal<'source>(pos: &mut usize, tokens: &[Token]) -> Expression<'
         token.loc,
         token
             .text
-            .parse::<u32>()
+            .parse::<i64>()
             .unwrap_or_else(|_| panic!("Fatal parser error! Invalid value in token {token}")),
     )
 }