diff --git a/crates/aiken-lang/src/parser.rs b/crates/aiken-lang/src/parser.rs
index 7914487d..dc4b04b3 100644
--- a/crates/aiken-lang/src/parser.rs
+++ b/crates/aiken-lang/src/parser.rs
@@ -24,7 +24,7 @@ pub fn module(
 ) -> Result<(ast::UntypedModule, ModuleExtra), Vec<ParseError>> {
     let lexer::LexInfo { tokens, extra } = lexer::run(src)?;
 
-    let stream = chumsky::Stream::from_iter(ast::Span::create(tokens.len()), tokens.into_iter());
+    let stream = chumsky::Stream::from_iter(ast::Span::create(tokens.len(), 1), tokens.into_iter());
 
     let definitions = definition().repeated().then_ignore(end()).parse(stream)?;
 
diff --git a/crates/aiken-lang/src/parser/utils.rs b/crates/aiken-lang/src/parser/utils.rs
index 2e1716ce..0ce3e404 100644
--- a/crates/aiken-lang/src/parser/utils.rs
+++ b/crates/aiken-lang/src/parser/utils.rs
@@ -101,7 +101,7 @@ macro_rules! assert_expr {
 
         let $crate::parser::lexer::LexInfo { tokens, .. } = $crate::parser::lexer::run(indoc::indoc! { $code }).unwrap();
 
-        let stream = chumsky::Stream::from_iter($crate::ast::Span::create(tokens.len()), tokens.into_iter());
+        let stream = chumsky::Stream::from_iter($crate::ast::Span::create(tokens.len(), 1), tokens.into_iter());
 
         let result = $crate::parser::expr::sequence().parse(stream).unwrap();
 
@@ -122,7 +122,7 @@ macro_rules! assert_annotation {
 
         let $crate::parser::lexer::LexInfo { tokens, .. } = $crate::parser::lexer::run(indoc::indoc! { $code }).unwrap();
 
-        let stream = chumsky::Stream::from_iter($crate::ast::Span::create(tokens.len()), tokens.into_iter());
+        let stream = chumsky::Stream::from_iter($crate::ast::Span::create(tokens.len(), 1), tokens.into_iter());
 
         let result = $crate::parser::annotation().parse(stream).unwrap();
 
@@ -159,7 +159,7 @@ macro_rules! assert_definition {
 
         let $crate::parser::lexer::LexInfo { tokens, .. } = $crate::parser::lexer::run(indoc::indoc! { $code }).unwrap();
 
-        let stream = chumsky::Stream::from_iter($crate::ast::Span::create(tokens.len()), tokens.into_iter());
+        let stream = chumsky::Stream::from_iter($crate::ast::Span::create(tokens.len(), 1), tokens.into_iter());
 
         let result = $crate::parser::definition().parse(stream).unwrap();
 
diff --git a/crates/aiken-lang/src/tests/snapshots/parse_unicode_offset_1.snap b/crates/aiken-lang/src/tests/snapshots/parse_unicode_offset_1.snap
new file mode 100644
index 00000000..fd21a8e8
--- /dev/null
+++ b/crates/aiken-lang/src/tests/snapshots/parse_unicode_offset_1.snap
@@ -0,0 +1,52 @@
+---
+source: crates/aiken-lang/src/tests/parser.rs
+description: "Code:\n\nfn foo() {\n  let x = \"★\"\n  x\n}\n"
+---
+Module {
+    name: "",
+    docs: [],
+    type_info: (),
+    definitions: [
+        Fn(
+            Function {
+                arguments: [],
+                body: Sequence {
+                    location: 13..30,
+                    expressions: [
+                        Assignment {
+                            location: 13..26,
+                            value: ByteArray {
+                                location: 21..26,
+                                bytes: [
+                                    226,
+                                    152,
+                                    133,
+                                ],
+                                preferred_format: Utf8String,
+                            },
+                            pattern: Var {
+                                location: 17..18,
+                                name: "x",
+                            },
+                            kind: Let,
+                            annotation: None,
+                        },
+                        Var {
+                            location: 29..30,
+                            name: "x",
+                        },
+                    ],
+                },
+                doc: None,
+                location: 0..8,
+                name: "foo",
+                public: false,
+                return_annotation: None,
+                return_type: (),
+                end_position: 31,
+                can_error: true,
+            },
+        ),
+    ],
+    kind: Validator,
+}
diff --git a/crates/aiken-lang/src/tests/snapshots/parse_unicode_offset_2.snap b/crates/aiken-lang/src/tests/snapshots/parse_unicode_offset_2.snap
new file mode 100644
index 00000000..f0186e94
--- /dev/null
+++ b/crates/aiken-lang/src/tests/snapshots/parse_unicode_offset_2.snap
@@ -0,0 +1,50 @@
+---
+source: crates/aiken-lang/src/tests/parser.rs
+description: "Code:\n\nfn foo() {\n  let x = \"*\"\n  x\n}\n"
+---
+Module {
+    name: "",
+    docs: [],
+    type_info: (),
+    definitions: [
+        Fn(
+            Function {
+                arguments: [],
+                body: Sequence {
+                    location: 13..28,
+                    expressions: [
+                        Assignment {
+                            location: 13..24,
+                            value: ByteArray {
+                                location: 21..24,
+                                bytes: [
+                                    42,
+                                ],
+                                preferred_format: Utf8String,
+                            },
+                            pattern: Var {
+                                location: 17..18,
+                                name: "x",
+                            },
+                            kind: Let,
+                            annotation: None,
+                        },
+                        Var {
+                            location: 27..28,
+                            name: "x",
+                        },
+                    ],
+                },
+                doc: None,
+                location: 0..8,
+                name: "foo",
+                public: false,
+                return_annotation: None,
+                return_type: (),
+                end_position: 29,
+                can_error: true,
+            },
+        ),
+    ],
+    kind: Validator,
+}