diff --git a/src/overlay/elements/leaderboard/leaderboard_entry.rs b/src/overlay/elements/leaderboard/leaderboard_entry.rs
index d45cdc5..c809b44 100644
--- a/src/overlay/elements/leaderboard/leaderboard_entry.rs
+++ b/src/overlay/elements/leaderboard/leaderboard_entry.rs
@@ -108,7 +108,26 @@ impl LeaderBoardEntry {
     pub fn change_name(&mut self, name: String) -> Result<()> {
         self.name = name;
 
-        self.name_label.set_text(&self.name)
+        self.name_label.set_text(Self::check_string(&self.name))
+    }
+
+    fn check_string(s: &str) -> String {
+        std::str::from_utf8(
+            &s.as_bytes()
+                .iter()
+                .filter(|&&b| {
+                    (b > 96 && b < 123) // small letters
+                        || (b > 64 && b < 91) // big letters
+                        || (b > 47 && b < 58) // numbers
+                        || b == 45 // dash
+                        || b == 95 // underscore
+                        || b == 32 // whitespace
+                })
+                .map(|&b| b)
+                .collect::<Vec<u8>>(),
+        )
+        .unwrap()
+        .to_string()
     }
 
     pub fn snippet(&self) -> Arc<GuiSnippet> {
@@ -253,3 +272,28 @@ impl LeaderBoardEntry {
         self.place_updated = false;
     }
 }
+
+#[cfg(test)]
+mod test {
+
+    #[test]
+    fn test_string_replacement() {
+        let s_orig = "blaü";
+        let s = super::LeaderBoardEntry::check_string(s_orig);
+        println!("{} {:?}", s_orig, s);
+
+        for b in s.as_bytes() {
+            println!("{}", b)
+        }
+
+        println!();
+
+        let s2_orig = "az AZ 09 # - _";
+        let s2 = super::LeaderBoardEntry::check_string(s2_orig);
+        println!("{} {:?}", s2_orig, s2);
+
+        for b in s2.as_bytes() {
+            println!("{}", *b);
+        }
+    }
+}