diff --git a/CHANGELOG.md b/CHANGELOG.md
index 97dfe27..e408d4f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+## v1.3.1 - 1 February 2024
+- Update to gleam_stdlib = "~> 0.34 or ~> 1.0" in preparation for 1.0
+
 ## v1.2.1 - 5 January 2024
 - Fix bug with double commas producing error, now produce empty string
 
diff --git a/gleam.toml b/gleam.toml
index 267793a..a73f87d 100644
--- a/gleam.toml
+++ b/gleam.toml
@@ -1,5 +1,5 @@
 name = "gsv"
-version = "1.2.1"
+version = "1.3.1"
 gleam = ">= 0.32.0"
 description = "A simple csv parser and generator written in gleam "
 
@@ -12,7 +12,7 @@ internal_modules = [
 ]
 
 [dependencies]
-gleam_stdlib = "~> 0.28"
+gleam_stdlib = "~> 0.34 or ~> 1.0"
 
 [dev-dependencies]
 gleeunit = "~> 1.0"
diff --git a/manifest.toml b/manifest.toml
index 274bd87..7762492 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -7,5 +7,5 @@ packages = [
 ]
 
 [requirements]
-gleam_stdlib = { version = "~> 0.28" }
+gleam_stdlib = { version = "~> 0.34 or ~> 1.0" }
 gleeunit = { version = "~> 1.0" }
diff --git a/src/gsv/internal/ast.gleam b/src/gsv/internal/ast.gleam
index 2f2408c..7a526a6 100644
--- a/src/gsv/internal/ast.gleam
+++ b/src/gsv/internal/ast.gleam
@@ -61,8 +61,7 @@ fn parse_p(
     [#(tok, loc), ..], Beginning, _ ->
       Error(ParseError(
         loc,
-        "Unexpected start to csv content: "
-        <> token.to_lexeme(tok),
+        "Unexpected start to csv content: " <> token.to_lexeme(tok),
       ))
 
     // If we just parsed a field, we're expecting either a comma or a CRLF
@@ -78,8 +77,7 @@ fn parse_p(
     [#(tok, loc), ..], JustParsedField, _ ->
       Error(ParseError(
         loc,
-        "Expected comma or newline after field, found: "
-        <> token.to_lexeme(tok),
+        "Expected comma or newline after field, found: " <> token.to_lexeme(tok),
       ))
 
     // If we just parsed a CR, we're expecting an LF
@@ -89,8 +87,7 @@ fn parse_p(
     [#(tok, loc), ..], JustParsedCR, _ ->
       Error(ParseError(
         loc,
-        "Expected \"\\n\" after \"\\r\", found: "
-        <> token.to_lexeme(tok),
+        "Expected \"\\n\" after \"\\r\", found: " <> token.to_lexeme(tok),
       ))
 
     // If we just parsed a comma, we're expecting an Escaped or Non-Escaped string, or another comma
@@ -126,7 +123,7 @@ fn parse_p(
       Error(ParseError(
         loc,
         "Expected escaped or non-escaped string after comma, found: "
-        <> token.to_lexeme(tok),
+          <> token.to_lexeme(tok),
       ))
 
     // If we just parsed a new line, we're expecting an escaped or non-escaped string
@@ -146,7 +143,7 @@ fn parse_p(
       Error(ParseError(
         loc,
         "Expected escaped or non-escaped string after newline, found: "
-        <> token.to_lexeme(tok),
+          <> token.to_lexeme(tok),
       ))
 
     // If we're inside an escaped string, we can take anything until we get a double quote,