diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e49184..8546586 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
+### Changed
+- 修正与 `newtx` 冲突（[#42](https://github.com/CTeX-org/gbt7714-bibtex-style/issues/42)）
 
 ## [v1.1.1] - 2019-03-21
 ### Added
diff --git a/gbt7714.dtx b/gbt7714.dtx
index d727b22..306b362 100644
--- a/gbt7714.dtx
+++ b/gbt7714.dtx
@@ -619,14 +619,13 @@ version 2005/12/01 or later.
 % \begin{macro}{\url}
 % 使用 \pkg{xurl} 宏包的方法，增加 URL 可断行的位置。
 %    \begin{macrocode}
-\def\UrlBreaks{%
-  \do\/%
-  \do\a\do\b\do\c\do\d\do\e\do\f\do\g\do\h\do\i\do\j\do\k\do\l%
-     \do\m\do\n\do\o\do\p\do\q\do\r\do\s\do\t\do\u\do\v\do\w\do\x\do\y\do\z%
-  \do\A\do\B\do\C\do\D\do\E\do\F\do\G\do\H\do\I\do\J\do\K\do\L%
-     \do\M\do\N\do\O\do\P\do\Q\do\R\do\S\do\T\do\U\do\V\do\W\do\X\do\Y\do\Z%
-  \do0\do1\do2\do3\do4\do5\do6\do7\do8\do9\do=\do/\do.\do:%
-  \do\*\do\-\do\~\do\'\do\"\do\-}
+\g@addto@macro\UrlBreaks{%
+  \do0\do1\do2\do3\do4\do5\do6\do7\do8\do9%
+  \do\A\do\B\do\C\do\D\do\E\do\F\do\G\do\H\do\I\do\J\do\K\do\L\do\M
+  \do\N\do\O\do\P\do\Q\do\R\do\S\do\T\do\U\do\V\do\W\do\X\do\Y\do\Z
+  \do\a\do\b\do\c\do\d\do\e\do\f\do\g\do\h\do\i\do\j\do\k\do\l\do\m
+  \do\n\do\o\do\p\do\q\do\r\do\s\do\t\do\u\do\v\do\w\do\x\do\y\do\z
+}
 \Urlmuskip=0mu plus 0.1mu
 %</package>
 %    \end{macrocode}
diff --git a/gbt7714.sty b/gbt7714.sty
index f9d0342..ae7974e 100644
--- a/gbt7714.sty
+++ b/gbt7714.sty
@@ -113,12 +113,11 @@
   \def@NAT@last@yr{-\NAT@penalty}%
 }
 \renewcommand\@biblabel[1]{[#1]\hfill}
-\def\UrlBreaks{%
-  \do\/%
-  \do\a\do\b\do\c\do\d\do\e\do\f\do\g\do\h\do\i\do\j\do\k\do\l%
-     \do\m\do\n\do\o\do\p\do\q\do\r\do\s\do\t\do\u\do\v\do\w\do\x\do\y\do\z%
-  \do\A\do\B\do\C\do\D\do\E\do\F\do\G\do\H\do\I\do\J\do\K\do\L%
-     \do\M\do\N\do\O\do\P\do\Q\do\R\do\S\do\T\do\U\do\V\do\W\do\X\do\Y\do\Z%
-  \do0\do1\do2\do3\do4\do5\do6\do7\do8\do9\do=\do/\do.\do:%
-  \do\*\do\-\do\~\do\'\do\"\do\-}
+\g@addto@macro\UrlBreaks{%
+  \do0\do1\do2\do3\do4\do5\do6\do7\do8\do9%
+  \do\A\do\B\do\C\do\D\do\E\do\F\do\G\do\H\do\I\do\J\do\K\do\L\do\M
+  \do\N\do\O\do\P\do\Q\do\R\do\S\do\T\do\U\do\V\do\W\do\X\do\Y\do\Z
+  \do\a\do\b\do\c\do\d\do\e\do\f\do\g\do\h\do\i\do\j\do\k\do\l\do\m
+  \do\n\do\o\do\p\do\q\do\r\do\s\do\t\do\u\do\v\do\w\do\x\do\y\do\z
+}
 \Urlmuskip=0mu plus 0.1mu