diff --git a/TODO.md b/TODO.md
index 83b389d..6963313 100644
--- a/TODO.md
+++ b/TODO.md
@@ -4,8 +4,9 @@
 - tests
 - https://source.android.com/docs/core/runtime/dex-format#system-annotation
 - goto size computation
+- Check label duplication (maybe allow identical labels at the same address only?)
 - no nop when no payload
 - name register / parameters
 - fix flake
-- fix python binding
+- fix python binding or remove
 - clean repo
diff --git a/androscalpel/src/code_analysis/method_cfg.rs b/androscalpel/src/code_analysis/method_cfg.rs
index 0b5729c..996a3ec 100644
--- a/androscalpel/src/code_analysis/method_cfg.rs
+++ b/androscalpel/src/code_analysis/method_cfg.rs
@@ -266,7 +266,14 @@ impl<'a> MethodCFG<'a> {
             let block_name = if i == 0 {
                 "ENTRY".into()
             } else if !node.labels.is_empty() {
-                format!("block '{}'", node.labels[0])
+                format!(
+                    "block '{}'",
+                    node.labels[0]
+                        .replace("&", "&amp;")
+                        .replace(">", "&gt;")
+                        .replace("<", "&lt;")
+                        .replace("\"", "&quot;")
+                )
             } else {
                 format!("block {i}")
             };