diff --git a/requirements.txt b/requirements.txt
index df6f0bb..ee217ee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ pyecharts==0.5.5
 pyecharts-javascripthon==0.0.6
 pyecharts-jupyter-installer==0.0.3
 pytest==3.7.1
-pytest-html=1.19.0
+pytest-html==1.19.0
 requests>=2.20.0
 retrying==1.3.3
 selenium==3.13.0