diff --git a/Cargo.toml b/Cargo.toml
index cab085b..d0ba9ae 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "nettext"
 description = "A text-based data format for cryptographic network protocols"
 authors = ["Alex Auvolat <alex@adnab.me>"]
-version = "0.2.1"
+version = "0.2.2"
 edition = "2021"
 license = "AGPL-3.0"
 readme = "README.md"
diff --git a/src/lib.rs b/src/lib.rs
index 6dd26fc..1a7c96a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -100,7 +100,7 @@ pub(crate) const DICT_OPEN: u8 = b'{';
 pub(crate) const DICT_CLOSE: u8 = b'}';
 pub(crate) const DICT_ASSIGN: u8 = b'=';
 pub(crate) const DICT_DELIM: u8 = b',';
-pub(crate) const STR_EXTRA_CHARS: &[u8] = b"._-+*?";
+pub(crate) const STR_EXTRA_CHARS: &[u8] = b"._-+*?@:";
 
 pub(crate) fn is_string_char(c: u8) -> bool {
     c.is_ascii_alphanumeric() || STR_EXTRA_CHARS.contains(&c)