diff --git a/set_version.sh b/set_version.sh
index b8b95de4..8b3f716b 100755
--- a/set_version.sh
+++ b/set_version.sh
@@ -1,3 +1,3 @@
 #!/bin/bash
-export version=0.5.3-1
+export version=0.5.3-2
 echo "pub const VERSION: &str = \"${version}\";" > src/version.rs
diff --git a/src/util/regex.rs b/src/util/regex.rs
index 051d518f..abe11520 100644
--- a/src/util/regex.rs
+++ b/src/util/regex.rs
@@ -1,4 +1,9 @@
 use once_cell::sync::Lazy;
 use regex::Regex;
 
-pub static RE_USERNAME: Lazy<Regex> = Lazy::new(|| Regex::new(r"^[^\u200B]+$").unwrap());
+/// Regex for valid usernames
+///
+/// Block zero width space
+/// Block lookalike characters
+pub static RE_USERNAME: Lazy<Regex> =
+    Lazy::new(|| Regex::new(r"^[^\u200BА-Яа-яΑ-Ωα-ω]+$").unwrap());
diff --git a/src/version.rs b/src/version.rs
index 68ec5e8d..ca12c069 100644
--- a/src/version.rs
+++ b/src/version.rs
@@ -1 +1 @@
-pub const VERSION: &str = "0.5.3-1";
+pub const VERSION: &str = "0.5.3-2";