diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0417fa..abbf03d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## [Unreleased](https://github.com/dalance/sv-parser/compare/v0.6.0...Unreleased) - ReleaseDate
 
+* [Changed] update str-concat
+
 ## [v0.6.0](https://github.com/dalance/sv-parser/compare/v0.5.0...v0.6.0) - 2020-01-24
 
 * [Added] ignore_include option
diff --git a/sv-parser-parser/Cargo.toml b/sv-parser-parser/Cargo.toml
index e6a9f2b..00e6dbc 100644
--- a/sv-parser-parser/Cargo.toml
+++ b/sv-parser-parser/Cargo.toml
@@ -24,6 +24,6 @@ nom-greedyerror      = "0.1.0"
 nom-packrat          = "0.3.0"
 nom-recursive        = {version = "0.1.1", features = ["tracer128"]}
 nom-tracable         = "0.4.1"
-str-concat           = "0.1.4"
+str-concat           = "0.2.0"
 sv-parser-macros     = {version = "^0.6.0", path = "../sv-parser-macros"}
 sv-parser-syntaxtree = {version = "^0.6.0", path = "../sv-parser-syntaxtree"}
diff --git a/sv-parser-parser/src/utils.rs b/sv-parser-parser/src/utils.rs
index 9221cfd..1710f33 100644
--- a/sv-parser-parser/src/utils.rs
+++ b/sv-parser-parser/src/utils.rs
@@ -435,7 +435,7 @@ pub(crate) fn current_version() -> Option<VersionSpecifier> {
 // -----------------------------------------------------------------------------
 
 pub(crate) fn concat<'a>(a: Span<'a>, b: Span<'a>) -> Option<Span<'a>> {
-    let c = str_concat::concat(a.fragment, b.fragment);
+    let c = unsafe { str_concat::concat(a.fragment, b.fragment) };
     if let Ok(c) = c {
         Some(Span {
             offset: a.offset,